A. picked up B. picks up
C. pick up
D. picking up
Tips:有些动词后面须接不带to
的不定式做宾语补足语, 常用的动词有: make, let, have, see; hear, watch, notice, feel; look at, listen to; help, observe 等, 但是句子变成被动语态后
3. To do as an object
不定式否定为not to)
agree, afford, tend, decide, determine,
expect, fail, hope, learn, intend,
manage, offer, plan, promise, refuse,
want, wish, pretend,
4. to do as an object complement You should get them to help you. (They will help you.) (常用谓语动词有: get, ask, force, order, tell, invite, allow, wish, want, like, expect, advise, beg, cause, persuade, teach, warn, hate, permit,forbid, encourage等。)
Grammar and usage To-infinitive and Verb-ing form
as a nounPart1To-infinitive
主 语
表 语
不 定 式
宾 语
宾语补足语
定 语 状 语
It作形式主语,不定式作真主语常见句型: It’s my duty to teach you how to learn English well.