Sometimes I go by car.是什么意思？

Sometimes I go by car.

有时我坐车去。

sometimes

adv. 有时，间或，时

例句
I want to work at home on a Tuesday but as it turns out sometimes it's a Wednesday or a Thursday.
我想周二在家工作，但实际上有时却是周三或是周四。

go

vi. 走，离开，去做，进

例句
I would love to go abroad this year, perhaps to the South of France.
我今年很想出国，可能是去法国南部。

by

prep. 在…旁边，表示方式，由于，经过；adv. 经过，表示保留或保存时用，短暂拜访；

例句
...expensive make-up that we saw being advertised by a beautiful model...
我们所见的由一位漂亮模特代言的昂贵化妆品

car

n. 汽车，车厢，轿车；

例句
His car was held up and he was abducted by four gunmen...
他的车遭遇拦劫，随后他被4名持枪歹徒劫持。