--If she were here,I'd ask her to sing an English song for u

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--If she were here,I'd ask her to sing an English song for us.--But she___here.What a pity!
A.doesn't B.wasn't C.didn't D.isn't 正确答案是D,为什么不能选B?

因为第一句话是与现在事实相反的虚拟语气,其形式是：从句是主语＋一般过去式形式（be 变were）,主句是主语＋would /should 等＋动词原行.
而第二句话是现在情况的事实陈述,所以答案是isn't 而非wasn't.

--If she were here,I'd ask her to sing an English song for u 连词成句sing,her,will,an,English,song,week,classmates,she,for,ne if you were to ask her,she'd tell you.----were to是什么用法 I can sing an English song for them i'd like to sing an english song with you 变一般疑问句 I'd like to sing an English song with you.改为一般疑问句 I'd like she to sing a song for us.那里错了?加翻译 She was heard __A______ an English song.A.to sing B.sing C.s I ____ ____(sing) an English song Will you please ask her to sing a song for us?we would like 英语问题]【She was heard _______(sing) an English song in her hom Let her (sing)an English song for you some foreigh friend wa