Use 'to' before the base form of a verb

Leaving out the small word "to" after verbs like want, need, plan or hope is a very common learner error. Native speakers treat that "to" as the bridge between two verbs; without it the second verb often sounds unfinished.

Below you'll find the core rule, the main exceptions, three quick rewrite templates you can copy, many realistic wrong/right pairs for work, school and casual use, and fast checks to fix sentences on the spot.

Short answer

Most verbs of desire, intention or decision (want, need, hope, plan, decide, expect) are followed by to + base verb: I want to go. Exceptions include modal verbs (can, should, might), some perception or causative verbs, and a few verbs that take a bare infinitive (let, make, help).

'I want to go' = correct; 'I want go' = incorrect in standard English.
Don't add 'to' after modals: 'I can help', not 'I can to help.'
Quick test: replace 'want' with 'would like' - if 'would like to' fits, use 'to' with 'want' too.

Core rule: the to-infinitive after verbs of intention

When the main verb expresses desire, intention, decision or preference, English usually uses the to-infinitive: to + base verb. Think of 'to' as the connector that completes the idea.

Structure: subject + (want/need/plan/hope/decide/expect) + to + base verb. Common verbs include want, need, hope, plan, decide, expect, learn, intend, promise.

Wrong: I want go to the store.
Right: I want to go to the store.
Wrong: She need finish the assignment tonight.
Right: She needs to finish the assignment tonight.
Wrong: We plan move next month.
Right: We plan to move next month.

Key exceptions (modals, bare infinitives, perception and causative verbs)

Not every verb before another verb needs 'to'. The main exceptions are modal verbs, certain perception verbs, and causative verbs that use the bare infinitive.

Modals (can, could, may, might, will, would, should, must) take the base verb: 'I can go' - never 'I can to go'.
Perception verbs (see, hear, feel) can take a bare infinitive when the full action is perceived: 'I saw him leave', not 'I saw him to leave'.
Causative verbs: let and make use a bare infinitive: 'She let him drive.'Help can be bare or take 'to': 'She helped me (to) move.'

Wrong: I should to reply to that email.
Right: I should reply to that email.
Wrong: I can to come tomorrow.
Right: I can come tomorrow.
Right: She made him apologize. (not: 'made him to apologize')
Usage: I heard her sing (complete action) vs I heard her singing (ongoing).

Quick grammar reference: which verbs need 'to', which don't

Use this checklist when editing or writing quickly.

Usually take 'to': want, need, hope, plan, decide, expect, would like, intend, promise, learn.
Usually bare infinitive (no 'to'): modals (can/could/will/would/should/must/might), let, make, see/hear/feel (in some uses), help (both).
Some verbs accept both forms with a change in meaning; be careful (e.g., stop doing vs stop to do).

Right: I hope to finish by Friday.
Right: He must arrive at 9. (not: 'must to arrive')
Right: They let him leave early. (not: 'let him to leave')

How to fix your sentence in 3 steps (fast checklist)

When you spot or suspect a missing 'to', run these three quick checks.

1) Identify the first verb. If it's want/need/plan/hope/decide/expect, you probably need 'to'.
2) Look for a modal or a causative/perception verb immediately before the target verb. If present, do NOT add 'to'.
3) Substitute test: replace the first verb with 'would like'. If 'would like to' reads correctly, keep 'to' in the original.

Wrong: I want finish the report tonight.
Right: I want to finish the report tonight.
Rewrite: Substitute test: 'I would like to finish the report tonight' → keeps 'to', so 'I want to finish...' is correct.

Try your own sentence

Paste a sentence into the checker below or run the three-step test on it. Context usually makes the right choice obvious.

Three rewrite strategies (replace, soften, split) with templates

Adding 'to' is often the only fix. If you want a different tone or clearer structure, use these templates.

Replace (politeness): "I want to..." → "I'd like to..." (useful in emails and requests).
Soften (ask instead of state): "I want to..." → "Could I...?" or "Would you mind if I...?" for polite requests.
Split (clarity): Break a long clause into two sentences to avoid infinitive confusion.

Rewrite:
Original: I want go to the meeting. → Replace: I'd like to go to the meeting.
Rewrite:
Original: I want send this now. → Soften: Could I send this now? / I'd like to send this now.
Rewrite:
Original: I want finish this and then submit it. → Split: I want to finish this. Then I'll submit it.

Examples by context: realistic wrong/right pairs (work / school / casual)

Grouped examples below reflect common sentences learners write in emails, classroom interactions and everyday talk. Each pair shows the missing-'to' error and the correct form.

Work
Wrong: I want send the proposal by Friday.
Right: I want to send the proposal by Friday.
Wrong: I want discuss the budget in the meeting.
Right: I want to discuss the budget in the meeting.
Wrong: I want review these slides before presenting.
Right: I want to review these slides before presenting.
School
Wrong: I want learn more about photosynthesis.
Right: I want to learn more about photosynthesis.
Wrong: I want finish my essay tonight.
Right: I want to finish my essay tonight.
Wrong: I want ask the professor after class.
Right: I want to ask the professor after class.
Casual
Wrong: I want go now.
Right: I want to go now.
Wrong: I want watch that new show tonight.
Right: I want to watch that new show tonight.
Wrong: I want try the pizza place you told me about.
Right: I want to try the pizza place you told me about.
Mixed
Wrong: I want start now, can you help?
Right: I want to start now; can you help?

Memory tricks and quick heuristics

Fast checks beat overthinking in most cases.

Bridge image: picture 'to' as a small bridge between verbs - without it the second verb 'falls'.
Would-like test: replace 'want' with 'would like'. If 'would like to' fits, use 'to' with 'want' too.
Modal stop: when you see can/could/should/must, stop - do not add 'to'.

Usage test: 'I want to go' → 'I would like to go' (both keep 'to').

Spacing and hyphenation notes (typography to avoid)

When you fix grammar quickly you can introduce small typographic errors. Watch for these two mistakes.

Keep 'to' separate: never write 'I wantto go'. Correct: 'I want to go.'
'To-do' (hyphen) is a compound noun - 'a to-do list' - but the infinitive remains unhyphenated: 'to do'.
In subject lines you might see 'To Do:' as a header, but in sentence form keep 'to' separate.

Usage: Wrong: I wantto go.
Correct: I want to go.
Usage: Compound: I put it on my to-do list. ≠ I want to do it.

Similar mistakes to watch for

The missing-'to' error often appears alongside other infinitive/gerund confusions and preposition mistakes. Check these common pairs:

Gerund vs infinitive: 'I enjoy swimming' (gerund) vs 'I want to swim' (infinitive).
Missing prepositions: 'I asked help' → 'I asked for help.'
Wrong tense with infinitive: 'I want to went' → 'I want to go' (base form only after 'to').

FAQ

Why do I need to use 'to' after want?

English marks the infinitive with 'to' after verbs that express intention or desire; without it the sentence sounds incomplete in standard usage.

Is 'I wanna go' correct?

'Wanna' is an informal spoken contraction of 'want to'. It's common in casual speech and informal text but inappropriate in formal writing; use 'want to' in professional or academic contexts.

When should I not add 'to' after a verb?

Do not add 'to' after modal verbs (can, should, will, must, etc.), after causative verbs like let/make (they use the bare infinitive), or after perception verbs when they take a bare infinitive to show a complete action.

How can I check quickly if my sentence needs 'to'?

Use the 3-step checklist: identify the first verb (want/need/plan/etc.), look for a modal or causative/perception verb (if present, do not add 'to'), and run the 'would like' substitution test. A grammar checker can also flag missing words.

Will a grammar checker always fix 'I want go'?

Most modern grammar checkers will flag and suggest adding 'to'. Still, learn the exceptions - automated tools sometimes misapply changes for perception or causative structures.

Try a quick check

When unsure, apply the substitution test ('would like') and the modal stop rule - these two fixes solve most cases. Practice with the examples above, then test your sentence in the checker to build confidence.

Write a few of your own sentences using the templates above and correct them with the widget or the three-step checklist to make the pattern stick.