内容正文:
Section Ⅲ Using language—Grammar
时态
[对应学生用书P71]
[观察]
1.Time and tide wait for no man.
2.I'll write to her when I have time.
3.The students are leaving on Sunday.
4.A meeting is to be held at 3 o'clock this afternoon.
5.I shall post the letter as soon as I have written it.
[归纳]
1.句1中为一般现在时态,表示客观事实或普遍真理。
2.句2在时间状语从句中用一般现在时代替将来时。
3.句3为现在进行时表示将来。
4.句4为一般将来时,其结构为be_to_do,表示按照计划或者安排即将发生的动作。
5.句5为现在完成时,表示将来要完成的动作。
[对应学生用书P71]
1.谓语构成:动词原形或动词的第三人称单数形式
2.用法归纳
(1)一般现在时表示现在经常或反复发生的动作或存在的状态,常和often,always,usually,sometimes,every day,once a week,rarely,seldom,hardly,ever,never等表示频率的时间状语连用;
I often read books in my spare time.
业余时间我经常看书。
(2)一般现在时用于描述主语的特征、性格、能力等;
Mary is good at music.
玛丽擅长音乐。
(3)一般现在时用于陈述客观事实或普遍真理;
The earth moves around the sun.
地球绕着太阳转。
(4)在主从复合句中,当描述将来的事情时,主句用将来时,条件状语从句、时间状语从句和让步状语从句用一般现在时代替一般将来时;
You'll make great progress if you work hard.
你如果努力学习,就会取得很大进步。
(5)一般现在时表示按照规定、计划或时间表将要发生的动作,通常限于表示“位置转移”的非延续性动词(词组),如go,come,leave,start,begin,open,close,arrive,take off等,其后常跟表示将来的时间状语。
The train leaves at 7:25 this evening.
火车今晚7:25发车。
[即学即练] 单句语法填空
①My brother plays(play) football quite well, but he hasn't_played(not play) it since last year.
②He is going to visit his grandparents as soon as he arrives(arrive) in Beijing.
③The teacher told us that light travels(travel) faster than sound.
完成句子
④哥伦布证实了地球是圆的。
Columbus proved that the_earth_is_round.
1.谓语构成:is/am/are+现在分词
2.用法归纳
(1)现在进行时表示现在或目前一段时间内正在进行的动作,常与now,at present,at this moment,these days,this week/month等时间状语连用;
All the classmates are reviewing the lesson in the classroom now.
同学们正在教室里复习功课。
These days, we are helping the farmers work on the farm.
这些天我们一直在农场帮农民们干活。
(2)现在进行时常与always,continually,constantly,forever等表示频度的副词连用,表示经常、反复发生的动作,常含有厌烦、责备、愤怒、抱怨、赞扬等情感;
She is always thinking of others instead of herself.
她总是想着别人而不是她自己。
(3)现在进行时可以表示将来的动作,主要用于表示按计划或安排要发生的动作。常与come,go,leave,depart,arrive,stay,start/begin,lecture,take off等动词(词组)连用。
Mr Smith is leaving for Nanjing tonight.
史密斯先生今晚去南京。
The meeting