He was often seen _________ with charity work last year.
A.to helpB.helpedC.helpingD.help
A

試題分析:see后面賓語(yǔ)可以接現(xiàn)在分詞,不帶to的不定式和過(guò)去分詞作賓語(yǔ)補(bǔ)足語(yǔ),不過(guò)含義不同. see sb. doing 表示看見(jiàn)某人正在做某事;see sb. do 表示看見(jiàn)某人做過(guò)某事;see sb. done 表示看見(jiàn)某人被…句意:去年(有人)經(jīng)常看見(jiàn)他幫助慈善團(tuán)體工作.結(jié)合語(yǔ)境可知本句指的是看見(jiàn)他做過(guò)某事.在被動(dòng)語(yǔ)態(tài)中,省略的不定式符號(hào)要加上,故選A.
點(diǎn)評(píng):此類題型主要是確定句子主語(yǔ)與謂語(yǔ)動(dòng)詞的關(guān)系。如果是主動(dòng)關(guān)系則用主動(dòng)語(yǔ)態(tài),反之如果是動(dòng)賓關(guān)系,則用被動(dòng)語(yǔ)態(tài)。注意一些接不帶to的不定式做賓語(yǔ)補(bǔ)足語(yǔ)的動(dòng)詞用作被動(dòng)語(yǔ)態(tài)時(shí),不定式符號(hào)to要加上。
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