同学你好，该知识点来自沪江网校《【Uni智能】雅思6.5分一站式VIP-初中起点【周年庆签约班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好，
常见的网校语法帖已经将三类给同学总结出来了哦，同学先掌握这三类就好：
（1）—How about coming to my house? —I’d love to if it doesn’t give you so much trouble. 在hope, like, love, promise, want, wish等词后作宾语的不定式常省略。再如： You may go if you want to. She can get a job if she hopes to. —How about going hunting with me tomorrow? —I’d like to, but I have no time.

（2）Don’t close the window until I ask you to. 在allow, ask, tell 等词后作宾语补足语的不定式常省略。再如： Don’t touch the light unless your mother allows you to. Don’t plant potatoes until the peasant tells you to.

（3）He didn’t want to hand in his composition, but he had to. 在be able to, be going to, have to, need to, enough to, used to等后的不定式需省略。

再如： I don’t sing much, now, but I used to a lot. If you don’t want to say anything at the meeting, you don’t need to.
She didn’t go out last night, because she was afraid to. 在afraid, glad, happy, pleased, sorry等词后作状语的不定式常省略。

再如：—Will you go with me to see the film tonight? —I’ll be glad to. 2、due to/be due to be due(to)有“应付给，应到的，预期的”之意，多用作表语，to不定式符号；而due to表示“由于，起因于”时，to是介词，相当于because of。如： The train is due to arrive at 12.火车应于12点到。 When is the ship due?船预定何时到？

希望对你有帮助o(∩_∩)o