underneath和under的区别

underneath和under的区别是意思不同、特定所指不同、用法不同。underneath更加侧重覆盖这种有外力存在的情况，under是用来表示最平常的方位上面的下。

例句：The coin rolled underneath the piano.硬币滚到了钢琴底下。This jacket's too big, even with a sweater underneath.即使里面穿一件毛衣，这件外套也太大了。The dog squeezed under the gate and ran into the road.狗从门底下钻出去，跑到大路上去了。The boat lay under several feet of water.那条船沉在水下好几英尺处。