was 能不能缩写's

was 能不能缩写's he was 到底能不能缩写成he's what is,what was能不能缩写成what's 强调句it is（was) .that/who,其中it is（was)能不能写成it's/it was不能缩写么? 下面这句英语中的he's 是不是he was ,he was 到底能不能缩写成he's what does能不能缩写成what's jack is能不能缩写成jack's? She has能不能缩写成She's It was 可缩写为It's He was 能否缩写为 he's? That was...可不可以缩写成That's... ? was可以缩写为's吗