already是什么时态的标志性词语

　　I'm going ─ I've done enough damage here already.

　　我要走了——我在这里造成的损害已经够大了。

　　We had to work within the parameters that had already been established.

　　我们必须在已设定的范围内工作。

　　The new government has already been pitched into a crisis.

　　新政府已被抛入危机之中。

　　We need double the amount we already have.

　　我们需要现有数量的两倍。