现在进行时表示正在进行的发生的动作.doc

现在进行时
现在进行时：表示正在进行的、发生的动作。
通常在句子中有以下的词：now, look, listen.
句子的结构如下： be + doing
am，is，are的用法口决：
我用am，你用are，
is 跟着她，他，它，
单数is，复数are
其中，动词的ing形式有如下方法：
A. 在动词后直接加ing: go- going , wash-washing, fly—flying
B. 以单个元音+单个辅音+e结尾 ， 去掉e加ing, 如 ：drive—driving；ride—riding；make—making
C. 某些单词要双写词尾的字母：swim- swimming； run—running；get—getting；
eg：1. I am listening to the music now.
2. The students are drawing pictures now.
3. Listen! She is singing .
4. Look! Mr Li is riding a bike.
二、一般现在时
一般现在时：表示经常发生的动作。常与every, always, usually, often, sometimes等表经常的时间状语连用。
注：当主语是第三人称单数时，谓语动词也要用第三人称单数。
动词第三人称单数：
A:直接加s
B:以ch，sh，s，x结尾的单词加es（washes, watches）
C:以辅音字母加y结尾的单词，变y为i加es。(studies)
eg:1. We often play in the playground.
2. He gets up at six o’clock.
3. Mike sometimes goes to the park with his sister.
4. Ben always has a lot of questions.
三、一般过去式
一般过去时：表示事情已经发生。
常见时间状语：last, yesterday, just now, a moment ago, some years ago.
句子特点：动词用过去式. 动词过去式分规则动词和不规则动词。
eg:1. I had an exciting party last weekend.
2. They all went to the mountains yesterday morning.
3. The pen was on the desk just now.
4. I was a student some years ago.
四、一般将来时
一般将来时：表示将要发生的事情。
句子结构：be going to ; 常见时间状语：next，tomorrow
eg:1. I am going to play football this afternoon.
2. Su Yang’s dad is going to New York next week.
3. Nancy is going to play the piano tomorrow.