if
[连词]
used to say that something happening, existing, etc. depends on another thing happening, existing, etc.

如果, 假如
Ex: We can go to the if the weather is nice .
as
[副词]
used in making a comparison between two things or persons

作为, 如同
Ex: You should as clearly as you speak .
as
[连词]
used to say that something is happening at the same time with another

当, 随着
Ex: The students took as the teacher explained the lesson .
so
[副词]
used to emphasize that how much or how intense something is by talking about what happens as a result

如此, 那么
Ex: The food so spicy my mouth was on fire .
after
[连词]
at some point subsequent to when something happens
Ex: The team after they won the championship .
before
[连词]
used to indicate that one event happens earlier than another event in time

在...之前, 在...之前的时间
Ex: We should buy before the store closes .
during
[介词]
used to express that something happens continuously from the beginning to the end of a period of time

在...期间, 在...的过程里
Ex: The students remained during the teacher 's lecture .
by
[介词]
used to indicate the means of doing or achieving something

通过, 借助
Ex: The goal was by consistent effort .
outside
[介词]
on or to a place beyond the borders of something

在...之外, 在外面
Ex: There is a lovely outside the museum .

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