Identify sentence structures (simple, compound, complex, compound-complex) for the following sentences: 1) I like playing basketball, and my brother likes playing tennis. 2) I'll help you if you help me. 3) My mother cooked dinner while I was doing my homework. 4) While I was doing my homework, my father cooked dinner and my mother was asleep in front of the television. 5) I don't know why he did that. 6) I prefer riding and struggling in tight public vehicles. 7) My family came to Germany when I was in grade 5, but I never learned to speak German very well. 8) She runs every day, so she is very fit. 9) Do you want to go swimming tomorrow, or would you prefer to play tennis?