know a hawk from a handsaw

例句：

1. 1. I know you'regoing to the party tonight.
   我知道你今晚要去参加派对。
2. 2. She knows how to fix cars.
   她知道如何修理汽车。
3. 3. We need to knowmore about the history of the country.
   我们需要更多地了解这个国家的历史。