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you should b-- a present for Allen on his birthday.

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/07/08 01:29:37
you should b-- a present for Allen on his birthday.
填bought还是buy?句中能看出是过去时态吗?
如果是将来时态就应该是you should buy a present for Allen for his birthday.
风唱梵音
uy也可以,have bought 也可以.
buy 的话意为 你应该为Allen买个生日礼物.(将来时)
have bought 的话意为 你本应该为Allen买个生日礼物的.(实际上没买)(过去虚拟时)