what's happened 中的“s”是has吗?还是is?还是was?还是什么?

是What happened 还是what’s happened what's up的's是is还是was? 是what has happened to还是what has happened at she's married中的是is,还是has? what's gotten into him 中'S指的是is还是has,还有was和is是不是都可以简写成'S Mary's being chose中的Mary's是Mary has 还是Mary is She said it's good for you.中的it's是it is 还是it was, what's中的后缀s是读s还是读z?where's中的s呢 ①what's the time?的be动词是is还是was?②what's the time? here‘s our friendship .是here is 还是here has styles 中的s发什么音?是【z】还是【s】? what is还是what was