I think it is the same to English sentences. First, one sentence must have a subject,like I,he,she,it,etc. Second, a verb or v.i , called predicate . Third, an object. This is the basic construction of a sentence. Of course,the first thing is to learn the grammar ,good luck to you

sorry it is 我想和你成为朋友！not have 交。typed a wrong word!

wow, this is a hard question to answer! I think Ethan's answer ia right, "you should learn the grammar structure of Chinese first", like we chinese study english, i think this is not very diffcult, but it is very different from english grammar structure, eg: i want to make friend with u! in chinese, it is 我想和你成为交朋友 . (i , want to ,with u ,make friend------of course, this is a wrong sentence. just to explain the question). The object(you) must be put in front. Maybe my answer is not clearly, and hope not to mislead u!

I think you should learn the grammar structure of Chinese first,then you could know what is the sentence formed.