您要查找的是不是：
- He couldn' t bend his mind to his studies. 他不能专心学习.
- He couldn' t hold down a job after his breakdown. 他病倒以後; 工作也就保不住了.
- He couldn't sit his mule. 他不会骑自己的骡子。
- He could not sit his mule . 他不会骑自己的骡子。
- He could not sit his mule. 他不会骑自己的骡子。
- He couldn' t take his eyes off the beautiful newcomer. 他目不转睛地盯着那位新来的美人.
- He couldn' t work out the equation, his sister helped him out. 他解不出那个方程式，他姐姐帮他算了出来。
- He couldn' t afford the fare ; he thumbed his way all over Europe. 他付不起车费,于是他搭便车走遍欧洲。
- Racking his brains, he couldn't think of a single example. 他绞尽脑汁却连一个例子都想不出来。
- "How he trots along on his mule! “瞧他骑着骡子小跑的神气模样儿！
- He couldn' t find a hold on the cliff. 他在悬崖上找不到一个可以站住脚的地方。
- He was determined to sit his rival out. 他决定比他的情敌留得更久。
- He couldn' t convince her anyhow. 他怎么想办法也不能使她信服。
- He couldn' t swallow because of a sore throat. 他因嗓子疼而不能吞咽。
- He couldn' t come up with an appropriate answer just at the time. 那时他想不出一个合适的答案。
- They won' t sit back and let you do it alone. 他们决不会袖手旁观让你一个人干的。
- He found he couldn' t string along with their unrealistic notions. 他感到不能同意他们的不切实际的想法。
- If you don' t sit still, the boat will upset. 如果你不安静坐好，便会翻船。
- Don' t sit on that chair it' s not stable. 别坐在那张椅子上，那椅子不稳。
- Don' t sit on my hat or you' ll squash it ! 别坐在我的礼帽上，你会把帽子压扁了！
