1. 动词的宾语：能以不定式作宾语的动词很多，常用的有afford, agree, ask, attempt, beg,
　　begin, bother, care, choose, decide, demand, desire, dislike, like, expect, fail, fear,
　　forget, hate, help, intend, learn, love, manage, mean, offer, plan, prefer, prepare,
　　pretend, refuse, remember, start, threaten, want, wish等，如：
　　Laser science began to develop in 1958.

　　如作宾语的不定式后有补足语时，用先行词it作形式宾语，而将真实宾语不定式移置补
　　足语之后，即用"V + it + Co + to V"句型，如：
　　I find it a pleasure to talk with you.
　　Do you think it possible to finish the work today?

2. 介词的宾语：介词but, except, besides (= except)和than可用不定式作宾语，如：
　　The enemy had no choice but to surrender.

　　在谓语动词中含有do的一定形式时，或can't but和can't help but后接不定式时，不
　　定式符号to省略，如：
　　She did nothing but (except) weep.
　　Whenever he asks me for help, I can't (help) but go.