作业帮区别(before,yet,still,在完成时中有怎样区别
来源：学生作业帮 编辑：作业帮 分类：英语作业 时间：2024/06/06 07:47:59
了解题思路： before,yet,still,在完成时中有怎样区别
解题过程：
单纯的before泛指以前，常与完成式连用。
.I haven't been to Beijing before.
She said she had seen that film before.
yet一般用在疑问句或否定句中：在疑问句中意为“已经”，在否定句中意为“还”，通常放在句末。如：
—Have you found the book yet？你已经找到那本书了吗？ —Not yet．还没找到。
She hasn't finished her homework yet．她还没有做完作业。
still意为“仍然；还”，表示某事正在进行中，可用于各种句式，一般只位于句子中间。如：
They are still working in the field．他们仍在地里劳动。
Do you still teach in that school？你还在那所学校教书吗？
Mr Wang still hasn't come back．王先生还没有回来。
最终答案：略
解题过程：
单纯的before泛指以前，常与完成式连用。
.I haven't been to Beijing before.
She said she had seen that film before.
yet一般用在疑问句或否定句中：在疑问句中意为“已经”，在否定句中意为“还”，通常放在句末。如：
—Have you found the book yet？你已经找到那本书了吗？ —Not yet．还没找到。
She hasn't finished her homework yet．她还没有做完作业。
still意为“仍然；还”，表示某事正在进行中，可用于各种句式，一般只位于句子中间。如：
They are still working in the field．他们仍在地里劳动。
Do you still teach in that school？你还在那所学校教书吗？
Mr Wang still hasn't come back．王先生还没有回来。
最终答案：略