1. want to be/become + (职业)名词 :“想要成为…..” I want to be (be) a scientist when I grow up. 2. write stories 写故事 tell stories 讲故事 3. keep on doing sth. 继续做某事(表动作的反复) keeping doing sth. 保持做某事(表动作或状态的持续) 4. be sur...
构成:have been doing sth. 用法:表示从过去某一时间开始一直延续到现在的动作。这个动作可能刚刚结束,也可能仍在继续,并可能延续到将来。(表示到现在为止一直在发生或反复进行的动作) ––– How long have you been waiting here? ––– I have been waiting here ...
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