小学英语动词用法（七）
小学英语动词用法（七）13. be worth doing值得做某事
He‘ll probably say no， though it’s worth trying. 他很可能不同意，但不妨去试探一下。
14. spend…doing花费...做某事
How much time do you spend practicing English every day？ 你每天花多少时间练习英文？
15. while/when doing
I like to listen to music while running. 我喜欢一边跑步，一边听音乐。
16. have a good time/fun/problems/trouble/difficulty doing 做某事有乐趣/问题/麻烦/困难
I have difficulty remembering names. 我不易记住人名。
17. prevent/stop/keep…from doing阻止...做某事
Nothing can prevent him from going. 什么都不能阻止他前往。
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