by car没有过去式。

乘汽车

It's too far to walk—I'll take you by car.

步行路太远，我开车送你去。

It's a day's journey by car.

开车的话要走一天。

We usually go by car.

我们通常开汽车去。

They live in a remote area， inaccessible except by car.

他们住在一处偏远地区，只能开车去。