让我们乘公交车去常州。

Let's go to Changzhou by bus.

我们乘公交车去了长城。

We went by bus to the Great Wall.

有时我们乘公交车去上学。

We go to school by bus sometimes.

有时我们乘公交车去上学。

Sometimes we go to school by bus.

贝蒂：我们在北京过的相当的开心。我们乘公交车和出租车去旅游景点。

Betty : We had quite a gook time in Beijing, We went sightseeing by bus and by taxi.