英语语法分析

These bikes are called tricycles.

这些自行车叫做三轮车。

I was amazed to see that many people were riding their old-fashioned tricycles.

看到许多人都骑着老式三轮车，我很惊奇。

Many pedal their tricycles, but most of them prefer to push or drag them.

很多孩子用脚蹬车，但多数孩子更愿意推或是拉着三轮车。