by 的用法
问题描述：
by 的用法
答
1.表时间：意为：到.时候为止We’ll have finished the work by ten o’clock.2.表交通方式：意为：乘坐某种交通工具He came here by sea/ plane/bus.3.表方位：在.附近We often go out for a walk by the river.4....