一般过去时
用于表示过去某时发生的动作或状态，常和表示过去的时间状语连用，如yesterday,last week,three years ago , in 1987, at the time , in July 。
一般将来时
主要用于表示将来发生的动作或情况
在时间或条件状语中，一般不用将来时，而是用现在时代替将来时。I’ll let you know the result when I finish everything。
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倒装句：完全倒装与部分倒装
完全倒装：1） 当时间副词；地点副词： now, then, here, there, inside 
The ring was inside. 
Inside was the ring. 
当表示地点的介词放在句首
A wounded man was lying under the tree. 
Under the tree was lying a wounded man. 
doing现在分词或者过去分词放在句首时
Lying under the tree was a wounded man. 
 Interaction n. --- interact v.   inter +action ; international; interpersonal 

shall, will + 动词原型构成一般将来时;
am (is , are) going to + 动词原型，表示近期打算去做的事情或可能要发生的事情;
am (is , are) about to + 动词原型，表示即将发生的动作;
am (is , an) to + 动词原型，表示必须或计划要进行的动作 You are to be here by 4 pm for collecting the shipment you ordered 

Vary v. =1） change: change/ vary from A to B
Vary from person to person : 因人而异
Opinions and attitudes regarding this problem/ issue vary from person to person. ( 议论文、观点态度类文章)
不同= differ : differ from/ vary from 
n. a variety of/ varieties of : 各种各样的
appropriate adj. = suitable 
Be appropriate for/ to 
Could you please say something appropriate for/ to this occasion? 
Inappropriate adj. 不适合的

When he was running after his brother, the boy lost his ________ and had a 
bad fall.
A. balance          B .chance          C .memory D .place 
【答案】A
He gave himself a new name to hide his ________ when he went to carry out
the secret task. 
A. emotion          B. talent            C. identity        D . treasure 

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