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如果不用after用非谓语动词什么形式表动作先后顺序
不用 after， 非谓语动词的完成时 having
done / to have done 表示发生在谓语动词之前的动.
eg. Having finished his homework,he
went to bed.
He seemed to have finished his
homework .
非谓语动词只表示与谓语动词的先后顺序吗
为你详细解答如下:
非谓语动词和谓语动词之间有两个重要的关系，时态和语态关系。
时态:非谓语动词的动作发生在谓语动词动作“之前”，“同时”，“之后”
语态:句子的主语在意义上是非谓语动词动作的执行者或承受者。
非谓语动词的形式有三种:动词不定式，动名词，分词。
现在用动词不定式来举例说明。
时态:
1.He wants to become a pilot.（他想当飞行员。）
分析:动词不定式动作to become,发生在谓语动词want之后，不定式表示将来。
2.He pretended to be working like mad.（他假装在发疯地干活。）
分析:不定式to be working动作发生在谓语动词pretended动作的同时，表示进行。
3.He seems to have finished his work.(他看起来已经完成工作了。)
分析:动词不定式动作to have finished,发生在谓语动词seem动作之前，表示完成。
注意:第三个例句，就是你要用非谓语动词来表示“过去”的想法。
语态:
1.He wants to become a pilot.
分析:句子的主语是动词不定式动作的执行者。
2.I don't want to be examined.(我不想接受医生的检查。)
分析:句子的主语是动词不定式动作的承受者。
非谓语哪个动作先发生变化
非谓语动词和谓语动词的相对时间关系 非谓语动词 相对谓语动词的时间意义 例句 一般式不定式 说明行为在谓语动词所表示的行为之后，多数是那些表愿望的词：want; hope; expect; wish等。 i want to go home. i hope to see you. 说明行为与谓语动词表示的行为同时发生，多数是那些省略不定式符号的词，一般是复合宾语。 i saw him come in. he helped him (to) carry things. 一般式动名词 表示动作与谓语动词表示的动作同时发出。 we enjoyed seeing the film. i am thinking of taking over the job. 在动词insist on; rely on; count on(相信)等后表示动作在谓语动词表示的动作之后发生。 he insisted on doing that work 在有些明确表示时间先后的动词和介词on; upon after代替完成动名词表示的动作在谓语动词表示的动作先发生。 i remember seeing him before. on arriving beijing, he went to see his friend. 一般式分词 现在分词 持续性动词 说明分词表示的动作和句中谓语动词表示的动作同时发生。 he stood there speaking. holding a book under his arm, he entered the room. 终止性动词 说明分词表示的动作发生之后，句中谓语动词表示的动作立刻发生。 entering the room, i found nobody in. turning to the right, you will find the post office. 过去分词 持续性动词 通常说明分词表示的动作，此句中谓语动词表示的动作先发生。 written in simple english, the book is easy to read. i can't find my lost pen. 说明分词表示的动作和句中谓语动词表示的动作并无先后。 he is a person well-known in this country. 代替完成式现在分词的被动语态。 educated by the party, he became a brave fighter. 完成式不定式 说明行为动词在谓语动词表示的行为动词之前发生。 i'm sorry to have troubled you. he is said to have come here. he is thought to have done it. he is believed to have done it. he seemed to have known it. 在wish, hope, expect, intend, mean, suppose等动词过去时后，说明行为动词没有实现。 we wished to have done this. i expected to have left by then. (=i had expected to heave by then.) 完成式动名词 说明动名词表示的动作，此句中动词表示的动作先发生。 we regret having told you the news. after having finished his work, he went home. he denied having broke the glasses. 完成式分词 说明分词表示的动作，此句中谓语动词表示的动作先发生。多数表示一些瞬时间动词。如果是hear; see或表示位置转移的动词arrive; leave; turn; open.不用完成时 having finished his work, he went home. sitting down with him, we begun to discuss it. hearing this, he rose and went to the door.
非谓语动词做题时是先看时态还是先看语态
先看语态！也就是被动还是主动，如果是被动一般是done的形式，如果是主动一般是doing
其次再看时态，也就是动作发生的先后，如果是主句动作之前，就是having
been
done或者having
done
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