题目内容
5.Before the computer wasinvented(discovered,invented),people couldn't chatting on theInternet.
分析 在电脑发明之前,人们不能在网上聊天.
解答 答案:invented.
一般过去时的被动语态的构成:was/were+过去分词,表示某人或某物被…discover的意思是"发现"发现原来就存在的事物;invent的意思是"发明,创造"发明以前没有的事物;根据"Before the computer was_____"在电脑发明之前,可知以前电脑是没有的,所以要用invent来填空,又因为空格前面是动词was,对于电脑来说是被发明的,所以要用invent的过去分词来构成一般过去时的被动语态,故填invented.
点评 首先要掌握invented的意思以及拼写,然后结合具体的题目,就可以确定正确答案
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