小升初英语语法时态讲解与归纳汇总(2)
来源:福州奥数网整理 2011-10-24 15:16:49
三、第三人称单数的动词变化规则(只有在第三人称为主语的肯定句中,动词才用三单式)
(1)多数动词直接加s:
runs gets likes collets takes plays climbs…….
(2)结尾是s, x, sh, ch, o,前为辅音字母,结尾加es :
watches teaches goes does washes crosses mixes brushes
(3)动词末尾y前为辅音:将y改为i加es:
study→studies fly→flies carry→carries cry→cries
但在y前如果为元音则直接加s:
buys says
四、时间标志:always , usually , often , sometimes ,every…
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