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11 ask sb for sth向某人什么

12 ask sb to do sth询问某人某事ask sb not to do叫某人不要做某事

13 at the age of在……岁时eg：I am sixteen I am at the age of sixteen

14 at the beginning of …… ……的起初;……的开始

15 at the end of +地点/+时间 最后;尽头;末尾eg : At the end of the day

16 at this time of year在每年的这个时候

17 be /feel confident of sth /that clause +从句 感觉/对什么有信心，自信

eg : I am / feel confident of my spoken English I feel that I can pass the test

18 be + doing表：1现在进行时2将来时

19 be able to (+ v原) = can (+ v原) 能够…… eg : She is able to sing She can sing

20 be able to do sth能够干什么eg :she is able to sing