原形do： Why not do? Why don’t you do? Shall we do? Let’s do
had better(not) do have sb. do let sb. do make sb. do （被动带 to）
感官动词 see / hear/ /watch / notice/ find / feel sb. do (过程)
would rather do than do prefer to do rather than do
doing： 1.There be …doing (主动) There be…+p.p.(被动)
2. have trouble / problem / fun /…time doing
3. 感官动词 see / hear/ notice/ find / feel sb. doing (正在做)
4.put off doing practice doing consider doing keep doing keep sb. doing
finish doing enjoy doing mind doing allow doing give up doing
be busy doing spend…(in) doing end up doing stop doing(停止做)
try doing（试着做）forget doing（忘了做过某事） remember doing（记得做过某事）
p.p. 现在完成时 have/ has +p.p. (since +过去时间点 / in the last few years / over the years / so far / just / ever / never/ already/ yet/ before)
过去完成时 had + p.p.
be+ p.p. 被动语态 get / have sth. + p.p. (让别人做某事)
a boy called / named… (被动意义,过去分词作定语) an organization set up
a book written by…=A book that was written by…
to do want to do would like to do plan to do decide to do wish to do attempt to do
hope to do used to do offer to do mean to do need to do seem to do learn to do fail to do(没能…) pretend to do agree to do can(not) afford to do get ready to do be supposed to do be afraid to do in order (not) to do ask sb.to do tell sb.to do order sb.to do allow sb.to do(sb. be allowed to do) help sb.(to)do encourage sb.to do lead sb.to do prefer to do too…to do 形+enough或enough+名 to do
It’s time to do 疑问词+to do be sure to do stop to do(停下来去做)
forget to do（忘记去做）remember to do（记得去做） try to do （试图、尽力去做）
I’m sorry / happy… to do It’s+名/ 形+to do I find/ think/ feel/ make it+形 + to do
It takes sb. some time to do be willing to do be used to do(被用来) happen to do（碰巧）
用法相同like to do /doing begin to do /doing start to do /doing continue to do /doing