你的例句中是She has的缩写 。 如果表示 她的 则是her，不是加s，如果表示被动 一般写成she was 或者she is(时态随定)例如she was forced to wrote these words， 她是被迫这下这些话的。
she has promised现在完成时
she is,跟she has 都可以缩写成she's
