英文句子中什么时候加to
1 当动词想作为主语成分时,应该加ing,用作动名词.
2 大部分动词后面再有动词的时候都用to来连接,作为不定式,有一些词后面ing 和 to 都能用,但是表达的意思不一样,这些词一下说不完,需要积累,比如forget,当后面是to时表示忘记做某事,还没做；后面加ing时表示忘记做过某事,已经做了.类似的词还有stop,prevent等,你平时注意留心一下.
3 有一部分词后面只能加ing,这类词大部分语法书上都有总结,大概36个左右吧,如avoid,appriciate,delay,imagine,等,你查一下吧.
4 动词不会做形容词成分的,最多作为定语或者壮语,这种情况加ing的时候都是分句和主语一致,是主动地.
什么时候动词加ing
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…
什么时候动词加y 好像没有吧!
O(∩_∩)O~