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情態(tài)動詞后必須接動詞原形嗎

有網(wǎng)友問：情態(tài)動詞后必須接動詞原形嗎？為什么有的書上又說情態(tài)動詞后接動詞完成式呢？現(xiàn)回答如下：

▲情態(tài)動詞后必須接動詞原形，不能接帶to不定式或動名詞等。如：

我們應(yīng)當(dāng)學(xué)講流利正確的英語。

誤：We must to learn to speak English fluently and correctly.

誤：We must learning to speak English fluently and correctly.

正：We must learn to speak English fluently and correctly.

▲注意，我們說的“動詞原形”指的是緊跟在情態(tài)動詞后面的那個動詞用原形。事實上，情態(tài)動詞后面的動詞可用進(jìn)行式、完成式、被動式等，只要保證第一個詞是“原形”就行了。如：

She might be waiting for you. 她可能在等你。

You must have seen him. 你一定見過他了。

She may have missed her train. 她可能誤火車了。

The road may be blocked. 這條路可能不通了。

The door must have been locked by my wife. 門一定是我妻子鎖的。