Could "a sentence of more than 7 years" become "a sentence more than 7 years?" The example Sentence is below: (1)The eight thieves served a sentence of between 2 and 7 years In sentence (1) the Prepositional phrase is used as object. But it is said that this usage is very rare, so I think maybe the prep "of" is redundant, maybe I could only say (2)The eight thieves served a sentence between 2 and 7 years Am I right? Or maybe people usually express in another way? Similarly, How about this sentence? Is this very common or a little weird in everyday English? (3)Come out from behind the door. Thank you for your help!

How to express "more than 3 times than something"? This is what I think: (1) 6 is three times as large as 2 (2) 6 is three times larger than 2 (3) 7 is more than 3 times larger than 2 Do I express them in the right way? Please tell me how to express this meaning in the common way. Thank you!

"Why are you here"=(1)"Why did you come here?"(2)"Why do you come here?"(3)"Why have you come here"? I wonder which of these 3 options are equal to the meaning of "Why are you here" and which is more common. This is what I think: (1)"Why did you come here?" means you came here at some time, maybe just now, not now (2)"Why do you come here?" is wrong, because "come" is a momentary verb, the action should have finished. Am I wrong? Please tell me, Thank you very much!

When should I use perfect tense or not when I see "by the end of"? For example: (1) the UN predicts 1.5 million more will join them by the end of 2014 (from NPR news) (2) By the end of this year, most of them will have left (from British News) (1) doesn't use perfect tense (2) uses perfect tense Could somebody tell me when I see "by the end of", whether I should use perfect tense or not and why? Thank you very much

An Important Place An important place to me is the Chinese National Library. It's near my university and I go there very often because I'm an undergraduate student and often need some books to refer to for my assignments, but my school library is too small to have those books, so I have to turn to this library. On the other hand, this library is very spacious and its desks are very wide, and it's very quite in it., so it's very comfortable for studying there and studying there could make me focused and efficient. That's why I like it. Hope you can make it sound more native and natural! Thank you for your help!

My Favorite Musican My favourite musician is Michael Jackson. Because I like his songs and dance. When I was a child and watched his concert video for the first time, I was totally shocked. How could a person dance like that? I can't even see his movement clearly. And his songs are so rhythmic that all the scene audience stood up and moved their body together. That's really impressive. Furthermore, he wrote the songs and lyrics and design the dance all by himself. So he is really talented. That's why I like him.

Should I use "though" or "although" in this sentence "I can help you though I'm not an expert" which is better? and if I use although, should i use a comma before it? Thank you for your help!