Unit4 I used to be afraid of the dark.
本单元话题为“我们怎样变化的”，主要围绕人或事物从过去到现在所发生的变化展开描述。写作时首先要理清写作的逻辑顺序，注意过去与现在的对比。在句式的使用上，既可用used to do/be…,but now…,也可以直接用一般过去时描述过去的情况，用一般现在时描写现在的情况，各种句式交替使用，以免文章显得呆板。
写作此类话题作文的常用表达有：
(1)…used to do/be
(2)How/what about you?
(3)…has/have changed a lot in the last few years.
【典型例题】
请你以Changes in people’s life 为题描述最近几年人们生活上的变化。词数80词左右。
提示：1. 人们的联系方式、娱乐方式的改变
2. 人们的出行方式及居住环境的改变
【优秀范文】
Changes in people’s life
Great changes have taken place in people’s life in the last few years.?
In the past people kept in touch with relatives or friends mainly by sending letters. They would listen to the radio for news and other information. Children used to go to school by bike. Big families had to share small rooms.
Now people can talk to others by telephone or on the internet at home. When they are free, they watch the news and other programs on TV. Some families are rich enough to send their children to school in their own cars. More and more people live in big and bright apartment with several rooms.
In a word, people live better than before.