How can I use those prepositions properly ? Are there any good ideas to remember them in a easy way? I always don't know which preposition should be used when I say something. For example, what time is it now "in" your country? I just think of "in", but I dare not say it out because it has so many different meanings in different usage. Another example: help somebody to do sth or help somebody do sth, I always have to look up the dictionary when I use it. Until just now，I know that both of them are acceptable. Although I have already know the correct patterns of two examples which I metioned above,there are still lots of other examples like this which I don't know how to express properly. Hope u can help me with this problem.

what does the phrase “lie in ”mean？ does it have the same meaning with “embody” or "reflect"?

Some app that often use by Chinese. The first one is wechat 微信 then the next one is QQ the third one is Sina Microblog /Sina Twitter/Weibo 新浪微博 I also love Instagram

Do you have wechat?Can you use it in your country? wechat is an app that provide people an opportunity to chat with each other for free as long as you have gprs or wifi. You can type letters or send voice. I think that we can use it to communicate because it's more convenient.If you use it, you can add me ,here is my ID: ivan9432