since it had been open.改错

？

自从她被车撞死后我一直很伤心怎写.
i am sad since she was killed by car.
i am sad since she died on The traffic accident
i am sad since she died in The traffic accident
i am sad since she died of The traffic accident
怎么表示达一直
i have been sad since she died of the traffic accident.
对吗They have been in the library since it had been open.
这句吗

since 引导的从句能用完成时吗？？
i am sad since she died of traffic

since后面接一般过去时即可。they have been in the library since it was opened.(最好把open换成opened)
一般不说 have been sad，因为have been表示一直处于某种状态，你可以把sad换成 in sorrow.
I have been deeply in sorrow ever since she died of the traffic accident.
有问题请追加~

1. 答案：open. 2. 解释： 1）此处填入的open是个形容词，be open表可以延续的状态，后面可以加一段时间since two years ago(=for two years). 2) 如果填入opened，则不妥。因为be opened表示一个被动的动作，但是该动作是一个瞬间性动词，不能延续，也就不能加since two years ago了。