Part 5 rammar 般现在时 一般现在时用原形动词表示,单数第三人称在其词尾加s或es 般现在时的用法如下 1用来表示经常发生的或习惯性的动作。一般现在时常与 always, usually, often, sometimes, every day等时间状语连用 I usually go to school at seven every morning 2表示主语通常具有的特征、性格、作风、习惯和能力等。 My grandfather gets up early and goes to bed late 3表示客观的事实或普遍的真理 Water boils at100°C The sun rises in the east and sets in the west
Part 5 Grammar 一 一般现在时 一般现在时用原形动词表示，单数第三人称在其词尾加s或es。 一般现在时的用法如下： 1 用来表示经常发生的或习惯性的动作。一般现在时常与always, usually, often, sometimes, every day等时间状语连用。 I usually go to school at seven every morning. 2 表示主语通常具有的特征、性格、作风、习惯和能力等。 My grandfather gets up early and goes to bed late. 3 表示客观的事实或普遍的真理。 Water boils at 100℃. The sun rises in the east and sets in the west
注意: 1在表示时间或条件的状语从句中,通常用一般现在时态代替一般将来时态 I will tell him as soon as i see him I'l go to see you if I have time 2以Here或 There开头的句子说明眼前正在发生的动作时,谓语动词却不能用现 在进行时,只能用一般现在时 There goes the bell Here comes the teacher!
注意： 1 在表示时间或条件的状语从句中，通常用一般现在时态代替一般将来时态。 I will tell him as soon as I see him. I'll go to see you if I have time. 2 以Here或There开头的句子说明眼前正在发生的动作时，谓语动词却不能用现 在进行时，只能用一般现在时 There goes the bell! Here comes the teacher!
一般过去时 般过去时通常用来叙述过去某一时刻或某一段时间发生的动作和状态。 一般过去时的用法如下: 1用于表示过去某一时期或某一段时间发生的一次动作或主语当时所处的状态, 常与 yesterday, last night, a moment ago,in1980等连用。 Did your father go to work early yesterday? 2用于叙述过去一段时期内经常的或反复的行为,常与表示频度的时间状语 every day, always,ofen, sometimes等连用 When I was in the middle school, I played football every day. 3在时间状语从句或条件状语从句中表示过去将来时态的动作 He said he would tell her the good news when she came 在虚拟语气条件从句中,用过去时态表示现在的时间或将来的时间 If he was here now, he could help us
二 一般过去时 一般过去时通常用来叙述过去某一时刻或某一段时间发生的动作和状态。 一般过去时的用法如下： 1 用于表示过去某一时期或某一段时间发生的一次动作或主语当时所处的状态， 常与yesterday, last night, a moment ago, in 1980等连用。 Did your father go to work early yesterday? 2 用于叙述过去一段时期内经常的或反复的行为，常与表示频度的时间状语 every day, always, often, sometimes等连用。 When I was in the middle school, I played football every day. 3 在时间状语从句或条件状语从句中表示过去将来时态的动作 。 He said he would tell her the good news when she came. 4 在虚拟语气条件从句中，用过去时态表示现在的时间或将来的时间。 If he was here now, he could help us
Unit 2 Suggested Keys Comprehensive Exercises a 1 add 2 square 3 repair 4 comfortable 5 cool 6 during B 1 anything in between 2 is made of 3 repair the bike 4 keep our classroom clean 5 needs 6 change into 7 square table 8 put forward a problem C(略) D 1-5ACBD C
Comprehensive Exercises A 1 add 2 square 3 repair 4 comfortable 5 cool 6 during B 1 anything in between 2 is made of 3 repair the bike 4 keep our classroom clean 5 needs 6 change into 7 square table 8 put forward a problem C (略) D 1—5 A C B D C Unit 2 Suggested Keys
Grammar Exercises A 1-5ACCCB 6-10ADDCA 11-15AD CAA 16-20BC CAC B1tel→told2 works→Work3work→ works 4 dressed→ dress5need→ needs6 wares" wears 7 costs→cost8is→Was9knew→know10 existed→ exists
Grammar Exercises A 1-5 A C C C B 6-10 A D D C A 11-15 A D C A A 16-20 B C C A C B 1 tells → told 2 works → work 3 work → works 4 dressed → dress 5 need → needs 6 wares → wears 7 costs → cost 8 is → was 9 knew → know 10 existed → exists