有没有didn't have to do ,didn't need to doyou ________such a long composition .the teacher only asked for 200 words.A needn't have written B didn't have to write C didn't need to write我知道a肯定对 但不明白BC怎么不对,也有这两种

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有没有didn't have to do ,didn't need to doyou ________such a long composition .the teacher only asked for 200 words.A needn't have written B didn't have to write C didn't need to write我知道a肯定对 但不明白BC怎么不对,也有这两种
有没有didn't have to do ,didn't need to do
you ________such a long composition .the teacher only asked for 200 words.
A needn't have written
B didn't have to write
C didn't need to write
我知道a肯定对 但不明白BC怎么不对,也有这两种表达的吧?

有没有didn't have to do ,didn't need to doyou ________such a long composition .the teacher only asked for 200 words.A needn't have written B didn't have to write C didn't need to write我知道a肯定对 但不明白BC怎么不对,也有这两种
A,needn't have done“本没有必要做某事”指的是那件事你已经做过了.
有B,C这两种用法,都表示“没有必要做某事”但没有包含“已经做过了”这一含义.

这是个对过去的虚拟用a bc都是指过去怎么样是事实 不能表示虚拟

好像没有过去式的这种表达方法。。
一般就用。。。
you don't have to do..
you don't need to do...

BC都是过去时,应该用A过去完成时。