that's= that was?that's sometime= that was?

that's= that was?that's sometime= that was?
that's= that was?
that's sometime= that was?

that's= that was?that's sometime= that was?
that's=that is
that was 不能缩写成 that'was

=that is or that was

that's = that was or that is.

一般来说 that's 就是that is。。was时候一般不缩写 口语除外。。