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(2) The message is very important, so it is supposed _________ as soon as possible. (陜西卷)

A. to be sent             B. to send                   C. being sent             D. sending

答案為A。be supposed后習(xí)慣上不接動(dòng)名詞，而接不定式，其意為“應(yīng)該做某事”，故可排除C和D；又因?yàn)椤跋�息”與“傳達(dá)”之間為被動(dòng)關(guān)系，故用被動(dòng)式。

2. 涉及動(dòng)名詞的主動(dòng)與被動(dòng)式

At the beginning of class, the noise of desks _________ could be heard outside the classroom. (全國(guó)II)

A. opened and closed                                    B. to be opened and closed

C. being opened and closed                            D. to open and close

答案為C。由于desks與open和close的關(guān)系是被動(dòng)關(guān)系，故要用被動(dòng)式，可排除D；又因?yàn)橛糜诮樵~of后作賓語(yǔ)，所以要用動(dòng)名詞，不用不定式或過(guò)去分詞，故可排除A和D，所以答案選C(www.hz123456.com)

3. 涉及現(xiàn)在分詞的主動(dòng)與被動(dòng)式

_________ that she was going off to sleep, I asked if she’d like that little doll on her bed. (北京卷)

A. Seeing                     B. To see                   C. See            D. Seen

答案為A。首先要排除B和C，因?yàn)?/FONT>B為不定式，它用于句首時(shí)，通常是表示目的，在此不合句意；而C為動(dòng)詞原形，選它會(huì)構(gòu)成祈使句，一是句意不通，二是這樣會(huì)導(dǎo)致前后兩句之間沒(méi)有連詞而出錯(cuò)。在剩下的A和D之間，只能選seeing，不能選seen，因?yàn)榫渥又髡Z(yǔ)是 I與see之間為主動(dòng)關(guān)系，而非被動(dòng)關(guān)系。