正如各位考生所了解的，非谓语动词仅有三类形式：to do，-ing和-ed三种形式，但是它们的用法却十分广泛，它向来都是各类英语考试的“宠儿”，无论是单项选择题，还是完型填空题、阅读理解题，甚至是在翻译题中也会有所涉及。为了更好地帮助各位参加教师招聘考试的考生更好地掌握非谓语动词的用法，笔者有意在接下来的内容中跟大家分享一下自己总结为出来的一些解题秘诀，并在秘诀后面附上相应的题目来解释这些秘诀的适用范围。根据这些秘诀，相信同学们应该能够更轻松地应对非谓语动词的出题套路!
秘诀一、逗号中间需连词，没有连词非谓语充。
例1.many times，buthe still couldn’t understand it.
A. Having been told B. Having told
C. He had been told D. Though he had been told
例2._________ many times, he still couldn’t understand it.
A. Having been told B. Having told
C. He had been told D. Though he had told
【解析】例1中有连词but连接，表明前后都是句子，所以答案为C;例2中后面是一个句子，而且没有连词，所以前面不是句子，应该用非谓语动词，根据句意此处为被动，所以答案为A。
秘诀二、不及物动词无-ed形式非谓语动词，及物动词有宾语时用-ing形式，无宾语时用-ed形式。
例3.____________ in the mountains for a week, the two students were finally saved by the local police.
A. Having lost B. Lost
C. Being lost D. Losing
【解析】lose为及物动词，现在后面没有宾语，所以用-ed形式，答案为B。
例4.__________, I really believe that I’d prefer not to make any change now.
A.Considered all the possibilities
B.Taking all the possibilities into consideration
C.Taken all the possibilities into consideration
D.Giving all the possibilities
【解析】把……考虑进来结构为take sth.into consideration，现在take后面有宾语all the possibilities，所以用-ing形式，答案为B。
秘诀三、being done 表示“正在被”，一般不作状语，只作定语。非谓语动词的完成时形式to have done或having done强调该动作发生在句子谓语动词之前。
例5.to reach them on the phone, we sent an email instead.
A. Fail B. Failed
C. To fail D. Having failed
【解析】根据句意“我们没有打通电话，就给他们发了个邮件”，没有打通电话应该发生在发邮件之前，所以用having done，答案为D。
