现在进行时.doc

文档介绍：三、语法：现在进行时的基本用法：
1. 表示说话人说话时刻正在进行的动作或发生事情。汉语中常用"在，正在"来表示。如：What are you doing ?I am writing a letter to my sister.
Look ! They are playing football on the playground.
2. 表示现阶段正在进行的动作或持续的状态，这一动作不一定在说话时刻正在进行。
It's getting colder and colder.
We are working hard to make our country rich and strong.
The teacher is writing a new book on math.
现在进行时的构成：
现在进行时是由is，am，are加上动词的现在分词构成的。如：
They are watching a football match. 他们正在看足球比赛。
Lily is reading English. 莉莉在读英语书。
Those boys are listening to a radio. 那些男孩在听收音机。
They are having a meeting now. 他们现在正在开会。
My father is working in the garden .
现在分词的构成规则
① 一般动词在词尾加ing，读[iη]
go--- going try--- trying
②以不发音字母e结尾的动词，先去掉e，再加ing
come---coming write---writing take--- taking
③以重读闭音节结尾的动词，如果末尾以一个辅音字母结尾，应先双写这个字母，再加ing，x和w结尾的除外
get--- getting swim--- swimming slow--- slowing
④以字母y结尾的动词，一律直接加ing构成现在分词
carry---carrying play--- playing study--- studying
⑤以字母ie结尾的动词，变ie为y，再加ing
die--- dying lie--- lying
⑥以元音字母加e结尾的动词，或以e结尾，且e发音的动词，直接加ing
see --- seeing be --- being
现在进行时的暗示词句：在句中出现