[10-20 18:09:40] 来源：http://www.67xuexi.com 初二英语 阅读：85161次
used to"过去经常，以前常常"。表示过去经常干某事(但现在已不是如此)。例如：
I used to draw pictures. I liked that. But I am too busy to do that.
我以前总画画，我喜欢，但我现在太忙了不画画了。
We used to grow beautiful flowers is the garden.我们过去常在花园里种美丽的鲜花。
There used to be many trees but now you see. The trees have all been cut down.
原来这里有好多树，但现在你看，树都被砍光了。
used to的否定式和疑问式有两种构成法：
9.并列句
连词but, on the other hand, while等连接两个并列的句子，表示"转折"关系，表示对比或相反的情况。例如：
Eric is a good friend, but he worries all the time.
艾力克是一个好朋友，但是他总是心事重重。
She is hardworking, but her sister is very lazy.
她很用功，但她妹妹却很懒。
Eric is very hardworking and patient. Danny, on the other hand, is very lazy and impatient. 艾力克是个非常用功，富有耐心的人。而丹尼却非常懒，没有耐心。
Danny forgets things. Eric, on the other hand, always remembers to turn off the lights.
丹尼易忘记事情。而艾力克总是记得关灯。
I have been to Beijing many times but my parents have never been there.
我去过北京多次,但我父母亲从没去过。
I drink black coffee while he prefers it with cream.
我爱喝清咖啡而他喜欢加奶油的。
English is understood all over the world while Turkish is spoken by only a few people outside Turkey itself.英语世界通行，但土耳其语离开本国就很少有人说人。
10."How+形容词"的特殊疑问句
How long is the Nile River?
How high is the Great Pyramid?
How deep is the Grand Canyon?
How far is Beijing from Shanghai?
11.过去进行时
①过去进行时用于表示过去某一时刻或某一段时间内正在进行或继续进行的动作。过去进行时经常与过去时搭配使用，过去进行时作过去时的时间背景。例如：
This time yesterday, we were having an English lesson. There was a slight earthquake.
昨天这个时候，我们正上英语课，这时发生了轻微地震。
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