1. it指天气
It is cloudy.
天气多云。
It is a lovely day.
今天天气晴朗。
It was pouring with rain.
刚才下着倾盆大雨。
It is a bit windy.
微微有点风。
2. it指时间
It's already nine o'clock.
已是9点了。
It's Tuesday today.
今天星期二。
It's our wedding anniversary.
这是我们结婚周年纪念日。
It's ten years since I saw you last.
从上次见到你以来已经五年了。
3. it指距离
It's a long way from here.
从这儿去很远。
It's three miles to the beach.
到海边有三英里。
It's an hour's walk to our school.
走路去我们学校要一个小时。
It's only twenty minutes' drive to the airport.
开车到机场只需20分钟。
4. it指环境
It's lovely here.
这儿环境优美。
It's getting very crowded here.
这儿变得很拥挤。
It's getting so dark.
天那么黑了。
It was very quiet in the garden.
花园里很安静。