1. 在情态动词后:情态动词后用不带to的不定式。
You must study hard. 你必须好好学习。
You should finish it as soon as possible. 你应该尽快完成这件事。
注:边际情态动词有所不同。如need作情态动词时,跟不带to不定式;作主动词后跟带to不定式。
We need stay at home this morning. (作情态动词)我们今晚要待在家里。
We need to stay at home this morning. (作主动词)我们今晚要待在家里。
2. 在半助动词后:
You had better bring an umbrella with you when you go out. 你出门最好带一把伞。
3. 在情态成语后:
在would rather/ would sooner/ would as soon, may/ might as well, cannot but/ cannot help but等情态成语之后,跟不带to不定式。
I would rather not know you. 我宁愿不认识你。
We might as well take a walk since it is sunny now. 天气晴朗,我们不妨走走。
4. 在rather than和sooner than(置于句首)后:
Rather than cause trouble,he left his hometown. 他宁愿离开家乡也不愿引起麻烦。
5. 在搭配“主动词+主动词”的第一个主动词后:
在该搭配中,第二个主动词就是不带to不定式。常见有make believe, let go, make believe, make do等等。
Let’s make believe we have won the game.让我们假装赢了比赛吧!
6. 在“使役动词+宾语”后:在make, let, have等使役动词加宾语后,用不用to不定式。
Let’s play basketball together. 让我们一起打篮球吧。
7. 在“感觉动词+宾语”后:
在“see,hear,observe, notice,feel”等感觉动词加宾语后,用不带to不定式。
I heard someone sing last night. 我昨晚听到有人唱歌。
8. 在“why/ why not”结构中:
Why not go shopping now. 为什么现在不去购物呢?
9. 在介词“except和but”后:
在except和but之前有“do”的某种形式,其后不定式不带to。
They have did nothing except wait.除了等待,他们什么也没做。
10. 在help后:
Can you help me solve this problem.你能帮我解决这个问题吗?
在以上这10种场合中,不定式均不需要加to。你都get到了吗?
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