Modal Verbs: 想, 要, 应该, 得, 必须, 可以, 能, 会

Primary learner problem: Learners translate “want,” “must,” and “can” too broadly, causing errors with 想/要, 应该/得/必须, and 可以/能/会.

Modal verbs express stance toward an action

A modal verb tells us how the speaker relates to an action:

• Do you want to do it?
• Are you planning to do it?
• Should you do it?
• Must you do it?
• Are you allowed to do it?
• Are you able to do it?
• Do you know how to do it?

Mandarin uses several common modal verbs:

想, 要, 应该, 得, 必须, 可以, 能, 会

They often appear before the main verb:

我想去。 I want to go / would like to go.

我得走了。 I have to go.

我会开车。 I know how to drive.

The problem is that English collapses many of these into a few words, especially “want,” “must,” and “can.” Mandarin keeps more distinctions active.

想 and 要: desire, intention, need, insistence

想: want, would like, think about

想 often expresses desire or intention in a softer way than 要.

我想去。 I want to go / I’d like to go.

我想买一本词典。 I’d like to buy a dictionary.

你想喝什么？ What would you like to drink?

想 can also mean “think” or “miss,” depending on structure:

我想一想。 I’ll think about it.

我想家。 I miss home.

要: want, be going to, need, must

要 can express stronger desire, intention, future plan, or need/requirement.

我要去。 I want to go / I am going.

我要一杯咖啡。 I want / I’ll have a cup of coffee.

他明天要考试。 He has an exam tomorrow.

这个要先洗。 This needs to be washed first.

要 can sound more direct than 想. In service contexts, 我要… is common for ordering, but in some requests it may sound demanding if not softened.

Compare:

不想 and 不要

我不想去。 I do not want to go.

我不要这个。 I do not want this.

不要 can also mean “do not” in commands:

不要说话。 Do not talk.

Context decides whether 不要 means “do not want” or “do not do.”

应该, 得, 必须: obligation and necessity

应该: should

应该 expresses expectation, advice, moral/social obligation, or likely correctness.

你应该早点休息。 You should rest earlier.

我们应该尊重他的意见。 We should respect his opinion.

他应该已经到了。 He should have arrived already.

The last example is not moral obligation. It expresses inference or expectation.

得: have to, must, need to

The modal 得 is pronounced děi. It is common in speech and means “have to” or “must due to circumstances.”

我得走了。 I have to go.

明天得早起。 I/We have to get up early tomorrow.

这个问题得问老师。 This question needs to be asked to the teacher.

得 often feels practical, immediate, and spoken.

必须: must, have to, required

必须 is stronger and more formal than 得. It often appears in rules, requirements, strong statements, and serious advice.

所有人必须参加。 Everyone must participate.

申请材料必须完整。 Application materials must be complete.

我们必须解决这个问题。 We must solve this problem.

Compare:

可以, 能, 会: three kinds of “can”

English “can” is one of the biggest traps in Mandarin modal verbs.

会: learned skill or likelihood

会 often means “know how to” or “be able to because learned.”

我会开车。 I can drive / I know how to drive.

她会说中文。 She can speak Chinese.

你会游泳吗？ Can you swim?

会 can also express likelihood/future in some contexts:

明天会下雨。 It will probably rain tomorrow.

This is not exactly English future tense. It marks expected occurrence.

能: ability, capacity, conditions allow

能 often means “be able to” due to physical ability, circumstances, conditions, or possibility.

我今天不能去。 I cannot go today.

这个箱子太重，我搬不动。 / 我不能搬。 This box is too heavy; I cannot move/carry it.

你能听懂吗？ Can you understand by listening?

这里能停车吗？ Can one park here? / Is parking possible here?

能 often involves actual capacity or conditions.

可以: permission, acceptability, possibility

可以 often means “may,” “be allowed to,” or “is acceptable.”

我可以进来吗？ May I come in?

这里可以停车。 Parking is allowed here.

这个方法可以。 This method is acceptable / works.

你可以先休息一下。 You can rest first. / You may rest first.

可以 is common in permission and suggestions.

能, 会, 可以: comparison table

Modal stacking and order

Mandarin can combine modals, but not randomly.

我想去。 I want to go.

我想能早点去。 I hope I can go earlier. This is possible but context-specific.

我应该可以去。 I should be able to go / I probably can go.

我可能得晚点到。 I may have to arrive a bit late.

When modals stack, the first often comments on the speaker’s judgment toward the second.

The main learner point: do not stack modals by translating English word order. Learn common chunks.

Negating modals

Negation changes meaning sharply.

A major trap: “don’t have to” is usually 不用, 不必, or 不需要, not 不得.

你不用去。 You do not need to go.

你不必担心。 You do not need to worry.

不得 is formal and often prohibitive:

不得入内。 Entry prohibited.

Scenario-based choices

Asking permission

我可以进来吗？ May I come in?

Not:

?我会进来吗？ Can I come in? in the sense “Do I know how to enter?” Not the intended permission question.

Talking about learned skill

你会不会开车？ Can you drive?

Not usually:

?你可以开车吗？ This asks whether you are allowed/available to drive in context.

Saying circumstances prevent you

我今天不能去。 I cannot go today.

Not:

?我今天不会去。 This may mean “I will not go today,” depending context, not inability.

Giving advice

你应该早点睡。 You should sleep earlier.

Stronger:

你必须早点睡。 You must sleep earlier.

Conversational necessity:

你得早点睡。 You have to sleep earlier.

Common learner traps

Trap 1: using 会 for all “can”

Wrong for permission:

✗ 我会坐这里吗？

Natural:

我可以坐这里吗？

Trap 2: using 可以 for learned skill in all contexts

Possible but not best:

?我可以说中文。

Natural:

我会说中文。 我能用中文交流。

Trap 3: translating “must not” and “don’t have to” the same way

你不能去。 You cannot / must not go.

你不用去。 You do not need to go.

These are opposite in practical effect.

Trap 4: using 要 too bluntly in requests

Blunt:

我要你帮我。

Natural:

你能不能帮我一下？ 麻烦你帮我看一下。

Modal rewrite lab

Practice: choose the modal

1. I know how to drive.
2. May I ask a question?
3. I cannot attend tomorrow.
4. You should review first.
5. All visitors must register.
6. I have to go now.
7. I do not want to buy this.
8. You do not need to worry.
9. It will probably rain tomorrow.
10. Is parking allowed here?

Suggested answers:

1. 我会开车。
2. 我可以问一个问题吗？ / 我想问一下。
3. 我明天不能参加。
4. 你应该先复习。
5. 所有访客必须登记。
6. 我现在得走了。
7. 我不想买这个。 / 我不要这个。
8. 你不用担心。 / 你不必担心。
9. 明天会下雨。
10. 这里可以停车吗？

Module name: Mandarin Modal Decision Tree

Features:

• User chooses intended meaning: desire, intention, advice, obligation, practical necessity, permission, physical ability, learned skill, possibility, likelihood.
• Tool recommends 想, 要, 应该, 得, 必须, 可以, 能, 会.
• Negation mode distinguishes 不想, 不用, 不必, 不能, 不可以, 不会, 不应该.
• Scenario cards: service request, school rule, personal plan, job requirement, health advice, permission question.
• Error detector flags 会 for permission, 可以 for learned skill where 会 is better, and 不必须-style negative necessity errors.

Editorial notes

This article should connect to article 073 on potential complements and article 094 on polite requests. The most important editorial guardrail is avoiding one-word English equivalents. Each modal should be taught through scenario and stance.