havent 是什么時態

　　They haven't yet put a price on the business.

　　他們還沒有給這筆生意開價。

　　I haven't known him as long as you.

　　我認識他的時間沒有你長。

　　I haven't been here for a long time.

　　我已很久沒來這里了。

　　I haven't been able to get much work done today.

　　我今天未能干多少工作。

　　We haven't won yet, not by any means.

　　我們離成功還遠著呢。