（1）、Mr. Smith is doing morning exercises now. (改为否定句) Mr. Smith morning exercises now.
（2）、The old man has been in Jinan for about 50 years.（对划线部分提问） has the old man been in Jinan?
（3）、My friend asked me:“Do you want to go there?”(改写句子，句意不变) My friend asked me I to go there.
（4）、Because of your help, we could finish the work easily. (改写句子,句意不变) your help, we could finish the work easily.
（5）、Parents will allow teenagers to relax themselves if they finish their homework. (改写句子,句意不变.) Teenagers will be to relax themselves if their homework finished.
