John joined the army three years ago.(用since或for改写） 怎么写.

John joined the army three years ago.(用since或for改写） 怎么写. John joined the army two years ago等于___two years since he jo John joined the club two years ago?(用for改写原句) It is three years since he joined the army.为什么是用joined而不是用ha My brother has joined the army for three years.(同义句改写) he joined the army 3 years ago he__ ___the army for 3 years. It was three years ago that he joined the army与It is three y Gao Fang joined the League since three years ago(改为同义句） Gao John joined the army two years ago.等于John_______for two year My brother joined the army two years ago改写My brother()()a()f It is three years since I joined the army.改成完成时态 I Three years ____ ____ since he joined the army 填have passed