2015初中英語(yǔ)語(yǔ)法大全(31)

3、be(“是/存在”)動(dòng)詞的各種時(shí)態(tài)變化：

注意：句型變化時(shí),否定句在am /is /are /will /have /has /was /were /had /would 后面加not,而且not都可以縮寫為n’t (am后面not不可以縮寫)；疑問(wèn)句將am /is /are /will /have /has /was /were /had /would 優(yōu)先到句首。

4、其它謂語(yǔ)動(dòng)詞(主動(dòng)語(yǔ)態(tài))的時(shí)態(tài)變化一覽表：

5、八種時(shí)態(tài)的具體用法：

（1）一般現(xiàn)在時(shí)表示現(xiàn)階段經(jīng)�；蛄�(xí)慣發(fā)生的動(dòng)作或存在的狀態(tài),或說(shuō)明主語(yǔ)的特征。

①　一般現(xiàn)在時(shí)句子中常有的時(shí)間狀語(yǔ)：often,usually,sometimes,always,every(day等),     once/twice,a (week等), on (Sunday等),never,in the (morning等)。如：They go to the Palace Museum once a year.(他們每年去一次故宮)/ They often discuss business in the evening.(他們經(jīng)常在晚上商談生意)

②　表示客觀真理、事實(shí)、人的技能或現(xiàn)在的狀態(tài)時(shí)句子里一般不用時(shí)間狀語(yǔ)。如：The earth turns round the sun.(地球繞著太陽(yáng)轉(zhuǎn))/ Light travels faster than sound.(光傳播比聲音快)

③表示十分確定會(huì)發(fā)生(如安排好的事情)或按照時(shí)間表進(jìn)行的事情,用一般現(xiàn)在可以表達(dá)將來(lái),句子中可以有將來(lái)時(shí)間。如：The train for Haikou leaves at 8：00 in the morning.(開(kāi)往漢口的列車上午8點(diǎn)開(kāi)車)

④在時(shí)間狀語(yǔ)從句中(以when, after, before, while, until, as soon as等引導(dǎo))和條件狀語(yǔ)從句中(以if,unless引導(dǎo)),用一般現(xiàn)在時(shí)代替一般將來(lái)時(shí),句子可以有將來(lái)時(shí)間。如：Please ring me up as soon as you arrive in Germany.(你一到德國(guó)就給我打電話)/ If it rains tomorrow,we will have to stay at home.(如果明天下雨我們就只好呆在家)

⑤一般現(xiàn)在時(shí)用于倒裝句中可以表示正在發(fā)生的動(dòng)作,動(dòng)詞以come, go為主。如：Here comes the bus. (車來(lái)了)/ There goes the bell.(鈴響了)。

⑥一般現(xiàn)在時(shí)常用于體育比賽的解說(shuō)或寓言故事中。Now the midfield player catches the ball and he keeps it.

⑦人的心理活動(dòng)和感官動(dòng)作一般用一般現(xiàn)在時(shí)而不用現(xiàn)在進(jìn)行時(shí)表達(dá),常見(jiàn)動(dòng)詞有：like, love, hate, dislike, want, wish, hope, think(認(rèn)為),understand, remember, forget, mean, need, hear, feel, see. 如：I think it is going to snow.(我想天要下雪了)/ I really hope you can enjoy your stay here.(我真的希望你愉快地呆在這兒)