{"id":1416,"date":"2020-03-25T03:41:00","date_gmt":"2020-03-25T07:41:00","guid":{"rendered":"https:\/\/linguix.com\/blog\/?p=1416"},"modified":"2026-04-02T00:55:51","modified_gmt":"2026-04-02T00:55:51","slug":"who-vs-that-a-common-grammar-mistake","status":"publish","type":"post","link":"https:\/\/linguix.com\/blog\/who-vs-that-a-common-grammar-mistake\/","title":{"rendered":"Who vs. That: A Common Grammar Mistake"},"content":{"rendered":"\n<p>What&#8217;s the difference between &#8216;who&#8217; and &#8216;that&#8217;?<\/p>\n\n\n\n<p>That&#8217;s a good question, and here&#8217;s a rule for you: use &#8216;who&#8217; when you are talking about people, and &#8216;that&#8217; when you are talking about things.<\/p>\n\n\n\n<p>And that&#8217;s the end of the lesson!<\/p>\n\n\n\n<p>Except it isn&#8217;t, because things are a little more complicated than that.<\/p>\n\n\n\n<p>Because &#8216;that&#8217; can actually represent people too, and has been used in this way by a host of famous writers down the years. So, if your high school English teacher told you to live by the rule as mentioned above, then he or she was actually a little wide of the mark.<\/p>\n\n\n\n<p>&#8216;Who&#8217; is a relative pronoun, as is &#8216;which&#8217;. It is definitely correct to say that &#8216;who&#8217; is for when you are talking about people, and &#8216;which&#8217; is for when you are talking about things. This rule is non-negotiable.<\/p>\n\n\n\n<p>However, &#8216;that&#8217; is an acceptable alternative as a relative pronoun when using both &#8216;who&#8217; and &#8216;which&#8217;. However, &#8216;that&#8217; can only be used as a defining relative pronoun, and in a defining relative clause. It cannot be used as a non-defining relative pronoun in a non-defining relative clause.<\/p>\n\n\n\n<p>Are you confused yet?<\/p>\n\n\n\n<p>Don&#8217;t be, because this can be explained quite simply so you never need to make this mistake again.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Defining relative clauses<\/strong><\/h2>\n\n\n\n<p>Defining relative pronouns are used in defining relative clauses. Defining relative clauses are used when the subject or object needs to be defined in order to be identified. Here is an example:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;He is the man.&#8217;<\/p><\/blockquote>\n\n\n\n<p>Now, the natural question this raises is, &#8216;who?&#8217;, because without defining this man, we have no idea who is being referenced.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;He is the man who lives next to my sister.&#8217;<\/p><\/blockquote>\n\n\n\n<p>Now we can identify him (he&#8217;s the man who lives next to my sister).<\/p><\/p>\n\n\n\n<p>Here&#8217;s another example using &#8216;which&#8217;.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;This is the mug.&#8217;<\/p><\/blockquote>\n\n\n\n<p>But which mug are we talking about?<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;This is the mug which I use for all my hot drinks.&#8217;<\/p><\/blockquote>\n\n\n\n<p>Now we know!<\/p>\n\n\n\n<p>These examples both include what are called &#8216;defining relative clauses&#8217;. In both of these examples, &#8216;who&#8217; and &#8216;which&#8217; can be replaced with &#8216;that&#8217;, because the pronoun is defining. So:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;He is the man that lives next to my sister.&#8217;<\/p><p>&#8216;This is the mug that I use for all my hot drinks.&#8217;<\/p><\/blockquote>\n\n\n\n<p>So, to answer the original question, there is no difference between &#8216;who&#8217; and &#8216;that&#8217; when the relative pronoun is defining.<\/p>\n\n\n\n    \n\n\n\n<h2 class=\"wp-block-heading\"><strong>Non-defining relative clauses<\/strong><\/h2>\n\n\n\n<p>But relative clauses are not only used to define something. They can also be used to add information.<\/p>\n\n\n\n<p>In this case, &#8216;who&#8217; and &#8216;which&#8217; are still distinguished by whether they are adding information about a person or a thing.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;My brother, who is a keen runner, lives a healthy lifestyle.&#8217;<\/p><p>&#8216;My car, which is a Ford, is red.&#8217;<\/p><\/blockquote>\n\n\n\n<p>Now, the commas are a bit of a giveaway. That&#8217;s because everything included inside those commas is simply additional information that (which) is not required to define the subject of the sentence. If you removed those clauses, the sentences would still make sense:<\/p><\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;My brother lives a healthy lifestyle.&#8217;<\/p><p>&#8216;My car is red.&#8217;<\/p><\/blockquote>\n\n\n\n<p>It is also important to remember that the words &#8216;who&#8217; and &#8216;which&#8217;, in the original non-defining relative clause examples, cannot be replaced with &#8216;that&#8217;. So:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>&#8216;My brother, that who is a keen runner, lives a healthy lifestyle.&#8217;<\/p><p>&#8216;My car, that which is a Ford, is red.&#8217;<\/p><\/blockquote>\n\n\n\n<p>This simply doesn&#8217;t work, and the standard &#8216;who&#8217; and &#8216;which&#8217; must be used.<\/p>\n\n\n\n<p>So, to answer the original question once again (what is the difference between &#8216;who&#8217; and &#8216;that&#8217;?) the answer is that &#8216;who&#8217; is for when you are talking about people, and &#8216;that&#8217; is nothing!<\/p>\n\n\n\n<p>So, it really all comes down to whether it&#8217;s a defining relative pronoun, or not!<\/p>\n\n\n\n\n\n\n\n\n\n\n\n<h2>Quick rules and checklist<\/h2>\n<p>Decide whether the relative clause is essential to identify the noun. If it is essential (no commas), the clause is defining: use who for people, which for things, and you may also use that for either in defining clauses. If the clause merely adds extra information (set off by commas), it&#8217;s non-defining: use who for people and which for things; do not use that.<\/p>\n<p>Simple editing tests: remove the clause &#8211; if the sentence still identifies the same person or thing, the clause is non-defining. Look for commas &#8211; they usually mark non-defining clauses and signal that that is not allowed.<\/p>\n<p>Style note: many American guides prefer that for restrictive (defining) clauses and which for nonrestrictive (non-defining) ones; British usage is sometimes more flexible. When unsure, choose the form that makes your meaning clearest.<\/p>\n<ul>\n <li>Defining (no commas): &#8220;Students who complete the project will pass.&#8221; (You can also say &#8220;Students that complete the project will pass.&#8221;)<\/li>\n <li>Non-defining (commas): &#8220;My tutor, who helped me last year, retired.&#8221; (You cannot use &#8220;that&#8221; here.)<\/li>\n <li>Thing example: &#8220;The bike that has the red frame is mine.&#8221; vs &#8220;My bike, which I bought last year, needs repairs.&#8221;<\/li>\n<\/ul>\n\n<h2>FAQ<\/h2>\n<h3>Can &#8220;that&#8221; refer to people?<\/h3>\n<p>Yes &#8211; but only in defining (restrictive) clauses without commas. In non-defining clauses (with commas) use who.<\/p>\n<h3>How can I tell whether to use who, which or that?<\/h3>\n<p>Ask whether the clause is essential to identify the noun and whether commas are present. Essential + no commas \u2192 who\/which or that; non-essential + commas \u2192 who\/which (not that).<\/p>","protected":false},"excerpt":{"rendered":"<p>What&#8217;s the difference between &#8216;who&#8217; and &#8216;that&#8217;? That&#8217;s a good question, and here&#8217;s a rule for you: use &#8216;who&#8217; when you are talking about people, and &#8216;that&#8217; when you are talking about things. And that&#8217;s the end of the lesson! Except it isn&#8217;t, because things are a little more complicated than that. Because &#8216;that&#8217; can [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1413,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":"","_links_to":"","_links_to_target":""},"categories":[10],"tags":[15,503,530,534,581,531],"class_list":["post-1416","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-grammar","tag-grammar","tag-grammar-checking","tag-grammar-errors","tag-grammar-mistakes","tag-grammar-rules","tag-grammatical-errors"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.8 (Yoast SEO v24.8.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Who vs. That: A Common Grammar Mistake - Linguix Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/linguix.com\/blog\/who-vs-that-a-common-grammar-mistake\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Who vs. That: A Common Grammar Mistake\" \/>\n<meta property=\"og:description\" content=\"What&#8217;s the difference between &#8216;who&#8217; and &#8216;that&#8217;? 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