6种用法总结如下:
as表”作为“,例如:As a student, we should study hard.
as...as...表”和...一样“,例如:I am as tall as my fater.
as表”因为“,例如:As it was cold outside, we should wear more clothes.
as soon as表”一...就...“例如:As soon as I got home, I watched TV.
as表”当...“,例如:You can learn a lot as you read books.
such as表”例如“,例如:I have many activities such as doing homework and doing housework.