江西成考高起点英语助动词复习资料

来源:
江西成考网
发布日期
2017年04月19日

摘要:  (1)助动词be主要用法   a、be+现在分词构成进行时态。如:   He is listening to the radio.   他在听无线电广播。   What were you doing this time yesterday afternoon?   昨天下午这个时候你在干什么?   b、be+过去分词构成被动时态。   He is invited to the party.   他得到邀请参加这个聚会。   The letter was received this mornin

  (1)助动词be主要用法

  a、be+现在分词构成进行时态。如:

  He is listening to the radio.

  他在听无线电广播。

  What were you doing this time yesterday afternoon?

  昨天下午这个时候你在干什么?

  b、be+过去分词构成被动时态。

  He is invited to the party.

  他得到邀请参加这个聚会。

  The letter was received this morning.

  这信是今天上午收到的。

  c、be+动词不定式表示计划好了的将来动作。如:

  The meeting is to take place on Monday.

  会议将在星期一举行。

  (2)助动词have的主要用法

  have+过去分词构成完成时态。如:

  I have finished my work.我已干完了活儿。

  I had written the letter befor you came.

  在你来之前我已写好了信。

  (3)助动词do的主要用法

  a、帮助主要动词构成疑问句和否定句。如:

  Do you do morning exercises every day?

  你每天做早操吗?

  She didn't come yesterday.

  她昨天没有来。

  b、构成否定祈使句。如:

  Don't be to rude.

  不要这么无礼。

  Don't worry about that.

  不要为这事操心。

  c、加强陈述句和祈使句的语气。如:

  I do work hard.

  我的确是努力工作的。

  Do be careful!

  一定要细心!

  d、用于避免主要动词的重复出现。如:

  Do you do somke? Yes ,I do.

  你抽烟吗?是的,我抽。

  I went to concent yesterday.SO did he.

  我昨天去听音乐会了。他也去了。

  e、构成倒装句。如:

  Never dia he go here again.

  他再也没去过那里。

  Only then did I understand what she meant.