In spring, the weather changes a lot.
春天，天气变化很快。
In the morning, when I took bus to school, the weather was breezy and comfortable.
早上，我们坐公车去上学的时候，清风徐徐气候舒适。
I thought it would be a great day.
我觉得会是天气很好的一天。
However, when I got to school, the sky turned to be gray with the gloomy clouds as well as thunder.
然而，当我到学校的时候，天空突然乌云密布，而且开始打雷。

After a little while, it started to rain heavily.
过了一小会，天就开始下大雨了。
I was worried because I didn't take my umbrella.
我很担心因为我没有带伞。
I was afraid that I can't go home after class.
我怕放学后回不了家。
About thirty minutes later, the rain stopped and it was sunny before long.
大约三十分钟过后，雨停了，不久就出太阳了。
The air was so fresh and the sky was clear. This is spring.
空气很清新，天空也很清澈。这就是春天。