1.Theboxwastooheavytocarry(改为同意句)
Theboxwas()heav()we()carry()
2.Istudybuyworkingwithmypartner(对画线部分提问)
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3.Thereislittletealeftinthecap()改成反意疑问句
4.He'salreadybeentotheUnitedstates(改成否定句)
He()()beentotheUnitedstates()
5.Ihavetodosomeshoppingonmywayhome(改成一般疑问句)
Doyou()()dosomeshoppingon()wayhome?
说下理由是什么?