【題目】He __________ (fall) off the tree just now. He __________ (fall) off the tree twice.

【答案】fell has fallen

【解析】

句意:我剛才從樹上掉下來了。他已經(jīng)從樹上掉下來兩次了。

考查動(dòng)詞時(shí)態(tài)。第一句中時(shí)間狀語(yǔ)為just now,可知本句時(shí)態(tài)為一般過去時(shí),動(dòng)詞用過去式。fall動(dòng)詞,落下,過去式為fell,過去分詞為fallen。第二句中根據(jù)句意可知此處表示“他已經(jīng)掉下來兩次了”,可知時(shí)態(tài)為現(xiàn)在完成時(shí),主語(yǔ)為he,助動(dòng)詞為has。故填fellhas fallen。

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