thats
限定词
那是
used to refer to a person, object, idea, etc. that is separated from the speaker by space or time:
示例:
•
I've never liked that cousin of hers.
连词
那是
used to introduce a clause that reports something or gives further information, although it can often be left out:
示例:
•
She said (that) she'd pick it up for me after work.
代词
那是
used as the subject or object of a verb to show which person or thing you are referring to, or to add information about a person or thing just mentioned. It is used for both people and things. It can often be left out:
示例:
•
I can't find the books (that) I got from the library.
副词
那是
as much as suggested:
示例:
•
She's too young to walk that far.