英语几个小题------I am going to the supermarket this afternoon.------ ______ you are there,please buy some biscuits这里为什么填While 而不是As?Most of students will feel terrified (at) the first time they go to school.为什么不能加

英语几个小题------I am going to the supermarket this afternoon.------ ______ you are there,please buy some biscuits这里为什么填While 而不是As?Most of students will feel terrified (at) the first time they go to school.为什么不能加
英语几个小题
------I am going to the supermarket this afternoon.
------ ______ you are there,please buy some biscuits
这里为什么填While 而不是As?
Most of students will feel terrified (at) the first time they go to school.
为什么不能加at?我影响中都要有at

英语几个小题------I am going to the supermarket this afternoon.------ ______ you are there,please buy some biscuits这里为什么填While 而不是As?Most of students will feel terrified (at) the first time they go to school.为什么不能加
while 在..时
比如说 while you are waiting 在你等待时
as 有很多意思了 看语境是什么了 这里不一一讲了
不过也不知道怎么解释这个问题 我住在美国 没有听过 as you are there 这样的话
你这样想 先想中文 在你买东西时,帮我带个饼干 （不过在美国 biscuit不是饼干了 是一种饼类的甜品 不知道怎么讲了）接着你想 既然while 是 在..时 的话 那么英文就是 while you are there（或说 while you are buying stuff）不可能说 as you are there （这样的话就变成 因为你在这）
as 的例子 as the time past,my drawing skill improves a lot.因为在时间的推移下,我的画画技术提高了很多

As = 因为，既然
While = 趁