251. There is no doubt that...毫无疑问

　　252. There seems to be...看起来好像

　　253. There used to be...过去曾有……;曾经有过

　　254. There's no point in...是无意义的

　　255. There's no way...绝不可能

　　256. To a great/some extent 在很大/某种程度上

　　257. To be frank / honest 老实说,…….说实话

　　258. To one's delight 让某人高兴/惊奇的是

　　259. To start with 首先

　　260. To sum up...总之,…….总而言之

　　261. To tell (you) the truth说实话

　　262. We hold the opinion that...我们认为

　　263. We must do something to...我们必须采取行动以

　　264. We must take action (measures) to...我们必须采取行动/措施以

　　265. We should make every effort to...我们应该竭尽全力

　　266. What do you find the hardest in...你觉得……最大的困难是什么

　　267. What do you mean by...你……是什么意思

　　268. What do you say...你认为……怎么样

　　269. What do you think of...你认为……怎么样

　　270. What I'm getting at is...我的意思是

　　271. What is more serious is that...更严重的是

　　272. What's the point of...意义何在 为什么要

　　273. What makes you think...是什么让你认为…;你为什么认为

　　274. What seems to be the problem with...大概是什么问题

　　275. What seems to be the trouble is...好像问题在于

　　276. What surprised me is that...令我吃惊的是

　　277. What will you do if...如果……,你会做什么

　　278. What you have to do is...你必须做的是

　　279. What would you say /think of...你认为……怎么样

　　280. When do you want me to...你想让我在什么时候

　　281. When it comes to...谈到…;涉及到

　　282. When will it be convenient for you to...你看什么时候方便

　　283. Would you be so kind as to...能否请你…

　　284. Would you like to...你想……吗

　　285. You are expected to...你要;应该

　　286. You are (not) allowed to...(不)允许你

　　287. You are (not) permitted to...(不)允许你

　　288. You are required to要求你

　　289. You are supposed to...你应该

　　290. You don't have to 你没必要

　　291. You don't need to 你没必要

　　292. You really have to do something about...你的确应该处理一下;你真得为…...做点什么了

　　293. You should avoid doing sth.你应该避免做某事

　　294. You should make an effort to...你应该努力

　　295. You should make good use of...你应该充分利用

　　296. You should never...你绝不应该

　　297. You were (not) supposed to...你本(不)应该

　　298. You will be able to... if...如果……,你将能够

　　299. You'll never guess...你永远猜不到

　　300. You'll never think of...你绝不会想到