know what o'clock it is

例句：

1. 1. I know you're going to the party tonight.
   我知道你今晚要去参加聚会。
2. 2. She knows how to fixcars.
   她知道如何修理汽车。
3. 3. Heknew that he had madea mistake.
   他知道他犯了一个错误。