现在进行时
一.意义——当表示现在正在进行的动作或正在发生的事。
二.构成:be (am, is ,are )+动词现在分词-ing形式
肯定句: 主语 + be + 现在分词V-ing (+ 其他) I’m doing my homework now .
否定句:主语+be+not+动词-ing +其他. I’m not doing my homework now.
一般疑问句:Be+主语+动词-ing +其他?
Are you doing your home work now? Yes, I am . No , I’m not .
特殊疑问句:特殊疑问词+be+主语+动词-ing+其他?What are you doing now ?
三. 现在分词的构成:
(1)一般在动词末尾直接加ing,
(2)以不发音字母e结尾的动词,先去掉e,再加ing,
如 skate →skating make →making dance → dancing write → writing have → having
ride → riding come → coming
(3)以重读闭音节结尾的动词,中间只有一个元音字母,词尾只有一个辅音字母,应双写末尾的辅音字母,再加ing, 如: putting running beginning stopping swimming shopping jogging
sitting getting forgetting letting
四.时间标志——now,句前的look ,listen