so's

Contraction

 * 1) So that, in order that.
 * 2) To the extent that.
 * 1) To the extent that.

Contraction

 * 1) So is.
 * My father's at work right now. So's my mother.

Contraction

 * 1) So has.
 * My father's gone away on holiday. So's my mother.