I leave for school at seven

七点───Seven o'clock;出发───set out

I'm afraid I can't make it before seven o'clock.───恐怕我不能在七点前赶到。

only seven o'clock now.───现在才七点钟。

man who gets up at seven o'clock every morning is punctual.───每天早上七点起床的人是守时的。

By seven o'clock this afternoon we shall have got to Shanghai if the train keeps good line.───如果火车运行正常，我们今天下午七点就到上海了。

At seven o'clock the coffee was made and the pan was on the back of the stove, hot and ready to cook dinner.───七点钟，她煮好了咖啡，把煎锅置于热炉上，随时都可做晚餐。

Roger opened his eyes and looked at the clock. It was nearly seven o'clock.───罗杰睁开眼看了下钟，还不到7点。

I awoke at seven o'clock.

We can go to the seven o'clock performance or the eight - whichever suits you best.

We'll eat at seven o'clock.

Please be here at seven o'clock sharp.

Only half the guests had arrived by seven o'clock.