省to不定式作宾补及用法1、在 be + 形容词 (如：glad, happy, pleased, anxious, willing, ready等词后保留 to.
1)-- Will you join us in a talk?
-- Yes, I’ll be glad to.
不定保留 to, 常见形容词; 愿意三高兴， 一个备着急。
2、在 love, like, mean, hope, advise, expect, want, persuade, refuse, wish, seem等动词后保留 to.
1)-- Would you like some bananas?
-- Yes, I’d love to.
动后保留to, 有爱莫拒遥; 愿喜似期希，想劝提建议。
3、在 have, need, ought, be able, be going, used等动词后保留 to.
1)I didn’t want to go there, but I had to.
2) We get on pretty well.
Better than we used to.
情态常带 to,过去不得不; 需要是另类，应将能力住。
4、在 ask / tell / advise / persuade / wish / permit / allow + sb + to do sth结构中保留 to.
1)Don’t touch anything unless your teacher tells you to.
动后带 to作宾补,请叫建议和告诉; 但愿也留两允许, 勿忘一个要劝服。