The kite is made of paper．风筝是用纸做的.为什么不用过去式（was）而用is?The CD is made in China呢?

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The kite is made of paper．风筝是用纸做的.为什么不用过去式（was）而用is?
The CD is made in China呢?

is made of 偏重解释性质.
was made of
The kite is made of paper． 强调的是 （所有风筝）由纸制作而成.
（the kite/a kite/kites 作主语表类别）
我们常常说The CD was made in China.是表示：这个CD是在中国制造的,（如果是用The CD is made in China.则是说所有CD由中国制造了.不合理）

为什么要用过去式哈 一般式表示乐观存在的真理 或者是一种普遍的习惯

表示客观事实和普遍真理一般用一般现在时。用过去时表示过去某一具体时间发生了的动作，已经发生并与现在无关。

这个是表示客观事实和普遍真理的呀，尽管它现在已经做好了但还是用一般现在时。比如 The earth runs around the sun. 一样的道理哦。这个事一般现在时重要的一个用法，一定要记住哦。
The CD was made in China.表示已经是成品了，而且制作的过程已经完成。而且制作CD其他国家也可以所以不是普遍真理，要用过去时的。...

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这个是表示客观事实和普遍真理的呀，尽管它现在已经做好了但还是用一般现在时。比如 The earth runs around the sun. 一样的道理哦。这个事一般现在时重要的一个用法，一定要记住哦。
The CD was made in China.表示已经是成品了，而且制作的过程已经完成。而且制作CD其他国家也可以所以不是普遍真理，要用过去时的。

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the kite which he is making his is made of plastic这句话怎么怪怪的 The kite ____paper.Can you make one ____meA is made from;for B is make of ;to C is made of ;for D is made from;to The kite is made of paper．风筝是用纸做的.为什么不用过去式（was）而用is?The CD is made in China呢? The shirt ______China. I prefer the clothes_____silk.A. is made in, made of B. made in C. is made in, is made of D. made in , made of The chair is made of wood. What is the sun made up of? the clothes are/is made of cotton? 用made的词组及正确形式填空1.the kite which he is ______his is ________plastic.2.100 people_______the team. The new book ____three partsis made ofis made fromis made into is made up of Jimmy is making a kite (with the help of his father).对括号内提问 ______ ______ Jimmy______ a kite. The jeans ( )cotton.A.are made of B.are made in C.is made of D.is made from All the things?paper.a.is made of /b.is made in/c.are made of/d.are made in 英语一个问题the great wall is made of brick and stone用is made of还是was made of the knife()iron A.is made of B.is made form C.isade in D.is made up of the newspaper is made of paper 还是made from 是不是应该是made of 为什么教案书上说是made from The earths surface is mostly__water.made from B.made of C.made up of D.made up the girl made beautiful kite yesterday 改为否定句 How I made the kite为什么用这个语序啊如题