语 境 自 主 领 悟
先观察原句
①I am speaking in favour of the Internet.
②There are two main points which must be included when we analyse the Internet.
③With the touch of a button or the click of a mouse，a student will find abundant information.
④These problems do not occur as often when people use traditional reference materials.
⑤To help solve this problem，a special clinic was opened in Beijing in 2005.
⑥One university did a study about the students who had dropped out.
后自主感悟
1.按英语词类划分，以上各句中黑体部分的词均为助动词。
2.以上各句中黑体部分的词均无词汇意义，不能单独作谓语。
3.例句②中的be和例句⑤中的was在句中与实义动词include和open一起构成被动语态。
4.例句①中的am，例句③中的will和例句⑥中的had在句中与实义动词speak，find和drop一起构成不同的时态。
5.例句④中的do_not在句中与实义动词occur一起构成否定形式。
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