used to do sth. 过去常常做某事
be used to do sth. 被用来做某事
be supposed to do sth. 理应做某事，应该做某事
allow sb. to do sth. 允许某人做某事
sb. be allowed to do sth. 某人被允许做某事
the best way is to do sth. 最好的方法是做某事
the next step is to do sth. 下一步是做某事
have nothing to do with 与某事无关
the first thing is to do sth. 第一件事是做某事
it’s best to do sth. 最好做某事
it’s a good time to do sth. 这是做某事的最好时间
it is a good way to do sth. 做某事是个好的办法
add to do 补充做某事
urge sb. to do 催促某人做某事
educate sb. to do 教育某人做某事
wait for sb. to do 等待某人做某事
order sb. to do 命令某人做某事
happen to do sth. 碰巧做某事
57. lead sb. to do sth. 领导某人做某事
it's a good place to do sth. 这是做某事的好地方
invite sb. to do 邀请某人做某事
get to do sth. 设计做某事
expect to do 期望做某事
volunteer to do sth. 志愿做某事
offer to do sth. 主动提供做某事
have an opportunity to do 有机会做某事
get sb. to do sth. 使某人做某事
it’s one’s duty to do sth. 做某事是某人的责任
use sth. to do sth. 用某物做某事
be sure to do sth. 一定会做某事
have to do sth. 不得不做某事
be able/unable to do sth. 能够/不能做某事
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