It is (was) obvious (clear) that...很明显…

　　It seems (seemed) that...好像…….似乎…

　　It sounds like 听起来好像…

　　It takes sb some time (money) to do sth.某人花多长时间/多少钱做某事

　　It wasn't until that...直到……才

　　It would be wonderful if...如果……那就太好了

　　It's not (just) like sb to do sth...的行为不/正像某人的一贯作风

　　lt's a bad habit to 是一个坏习惯

　　It's a great pleasure to (感到)非常愉快

　　It's customary to...是习惯

　　It's delightful to 令人很高兴

　　lt's my great honor to 是我莫大的荣幸

　　It's (not) good to...(不)好

　　It's our duty to...……是我们的责任

　　It's wrong to…是不对的

　　It's a shame (pity) that...可惜/遗憾……

　　It is (really) unbelievable that……(真)让人难以置信

　　It is (will be) difficult to……(会)很难

　　It'll do you good to……对你有好处

　　Last but not least 最后但同样重要的是……

　　Let me explain why 让我解释为什么……

　　Let me fill you in on...让我来告诉你……

　　(Just) let me know if...如果……,请告诉我

　　Let me see if...让我看看是否……

　　Make sure to do sth —定要做某事

　　Maybe it's better to...可能……会更好一些

　　means a great deal to me 对我意义重大

　　My dream (goal) (plan) is...我的梦想/目标/希望所划是…

　　My point of view is that...我的观点是……

　　no matter what...无论什么…

　　no one can deny that...没有人能够否认…

　　no sooner...than...一……就……

　　no words can express...语言难以表达……;……难以言表

　　Not until...did...直到……才……

　　Now that 既然/由于……

　　On the condition that 条件是…

　　On the contrary 正好相反

　　On (the) one hand on the other (hand) 一方面……,另一方面…

　　One of the is 最……之一的就是……

　　Personally, I think ( believe) (feel)...我个人认为/相信/感觉…

　　Please don't hesitate to...请随时

　　Please feel free to 请随时

　　Please forgive me for 请原谅我

　　Please give my best wishes to...请代我问候

　　Recent studies show that...最近研究表明…