1过去式：began
过去式题目：
1. The girls _began_(begin) to bob their hair to be in style. 姑娘们开始把她们的头发剪成时髦的短发。
2. She _began_ (begin) to lose faith in herself. 她开始对自己丧失信心。
3. He now _began_(begin) to inkle what was going on. 他现在开始有点明白究竟在发生什么事了。
4. The snow _began_ (begin) about midnight. 午夜前后开始下雪。
5. When they _began_(begin) to talk about him he pricked his ears. 当他们开始议论到他时，他竖起了耳朵
2过去分词：begun
过去分词题目：
1. She has _begun_(begin) on a new book. 她已开始看一本新书。
2. Many have _begun_(begin) it. I do not yet know whether or not they kept to it. 许多人都有开始在研究，但至于他们是否能够坚持下去，却非我预料所及的了。
3. He'd _begun_(begin) to follow me through the gates. 他本已开始要跟着我穿过那个大门了。
4. We must continue the important work that we have _begun_(begin) together. 我们必须继续已经开始进行的各项重要工作。
5. While proud of his record, Obama has already _begun_(begin) thinking about what went wrong — and what he needs to do to change course for the next two years. 当奥巴马对他的记录感到自豪的时候，他已经开始思考到底是哪里错了，以及他在未来的两年内该如何去改变航向。
6. Food distribution has _begun_(begin) in most of the affected areas, but food alone will not prevent disease and deaths. 在大多数受灾地区，食品分发已经开始，但是只有食品不能预防疾病和死亡。
