中学阶段，动词不定式固定结构是测试中的常见题型、易错题型，为此，熊猫老师特整理了中学阶段英语中常考易错的动词不定式固定结构，供大家参考。
(1) 疑问词 to do sth
*He doesn't know how to work out the problem.
*Do you know what to do next ?
*He hasn't decided when to take a holiday yet.
(2) would like to do sth：想要做某事
可以简写为'd like to do sth，相当于want to do sth。
*We would like to go fishing this weekend.
*They'd like to have a birthday party for him.
(3) be supposed to do sth：应该做某事，相当于should do sth，或ought to do sth。
*We are supposed to arrive at the meeting center before five PM.
(4) try one's best to do sth：尽力做某事
*All of us should try our best to accomplish the task at the end of this month.
(5) would you like to do sth：你想做某事吗？
*Would you like to go camping with me next week ?
(6) adj/adv enough to do sth：足够…以至于能做某事
*He is strong enough to move the big box in the corner.
(7) why not do sth ? ：为何不做某事(表建议)
*Why not have a cup of tea with us this afternoon ?
(8) Let's (not) do sth：让我们做…吧(表建议)
*Bill is unhappy today. Let's cheer him up.
(9) would rather do sth (than do sth)：宁愿做某事(而不愿做某事)
*My father doesn't like shopping. He would rather watch TV at home than walk around in the shopping centre.
(10) Shall we (not) do sth？：我们(不)做某事，好吗？
*Shall we go for a picnic in the park this Sunday ?
(11) Would/could/will you please (not) do sth：请你(不)做某事，好吗？
*Tom, would you please not open the box ? It's for your brother.
*Will you please come to my party this Friday ?
(12) too adj/adv to do sth：太…以至于不能做某事
*The boy is too young to take the underground alone.
(13) It is/was adj for/of sb to do sth：做某事对某人来说是…的
*It is important for us to protect the environment well.
(14) It takes/needs/requires some time (hours/days/months/patience…) to do sth：做某事花某人多少时间等。
*It will take us two hours to finish our homework.
*It takes him thirty minutes to walk to school every day.
(15) had better (not) do sth：最好(不)做某事
*It's getting dark. You'd better not go out by yourself.
*Look at the dark cloud. You'd better take an umbrella when you go out.
备注：动词不定式短语中，有时可以省略to。
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