哪些动词加动词原形

情态动词和助动词后面

can, could, may, might, will, would, shall, should, must, have to, need, ought to, dare, etc.

使役动词后面

make, let, hear, see, watch, have, get, bid, force, etc.

固定搭配

want to, intend to, plan to, hope to, like to, need to, decide to, expect to, offer to, plan on, belong to, consist of, pay attention to, take care of, break down, come up with, put off, take place, etc.

感官动词后面

see, hear, watch, notice, feel, smell, etc.

祈使句的谓语动词

用动词原形表示命令、请求、建议等

某些固定短语

look forward to doing, stop to do, It is time to do, be used to doing, prefer to do, be afraid to do, be ready to do, be able to do, be sure to do, have to do, be likely to do, be supposed to do, be meant to do, be due to do, etc.

并列不定式

两个以上的并列不定式用and或or连接起来，第二个不定式常省去to

why not…和why…句型

not和why后直接跟动词原形，构成反问

动词help后

help sb. （to） do sth. 或 help sb. with sth.

介词后

一般用动词的ing形式，但某些固定搭配后跟动词原形，如want sb. to do sth.

这些是一些常见的加动词原形的动词和情况，但并不是全部。在实际应用中，还需要结合具体的语境和语法规则来判断。