that，英文单词，可用作形容词、代词、连词、副词，还可用于固定搭配。
作代词时意为“那， 那个；那，那种；（非正式）就那样”，作形容词时意为“那样的”，作限定词意为“ 那，那个；那种”，作连接词意为"……可能是；
由于；以至于；（表示目的）为了；（诗、文）真希望",作副词意为“那样，那么；（非正式）很，非常”，作名词意为“（越）塔特（人名）”。
常见重要短语
in that，意为“既然、因为”。
Criticism and self-criticism is necessary in that it helps us correct our mistakes.
now that，意为“既然、由于”。
Now that they have taken matters into their hands, the pace of events has quickened.
see (to it) that，意为“注意、务必做到、保证”。
We will see to it that she gets home early.
See to it that you are not late again.
seeing that，意为“鉴于、由于”。
Seeing that it is 8 o'clock, we'll wait no longer.
Seeing that he was busy with his work, I didn't disturb him.
You use and all that or and that to refer generally to everything else which is associated with what you have just mentioned. 诸如此类 [非正式]。
You use that is or that is to say to indicate that you are about to express the same idea more clearly or precisely. 也就是说。
You use that's that to say there is nothing more you can do or say about a particular matter. 就那样好了 [口语]。