【題目】你什么時(shí)候意識(shí)到它是有害的?

____________________________________________

【答案】When did you realize that it was harmful?

【解析】

這是特殊疑問(wèn)句。詢問(wèn)“什么時(shí)候”疑問(wèn)詞用when；詢問(wèn)過(guò)去的事，用一般過(guò)去時(shí)，助動(dòng)詞用did，助動(dòng)詞提前，謂語(yǔ)動(dòng)詞用原形;主語(yǔ)是you;動(dòng)詞是realize，表示“意識(shí)到”；后面用that引導(dǎo)賓語(yǔ)從句，主過(guò)從必過(guò)，主句一般過(guò)去時(shí)，從句也是一般過(guò)去時(shí)。從句的主語(yǔ)是it；主系表結(jié)構(gòu)，be動(dòng)詞用was，“有害的”用harmful，形容詞作表語(yǔ)。故答案為When did you realize that it was harmful?

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