joined the army 这句话的汉语是什么?

joined the army 这句话的汉语是什么? joined the army什么意思? I'll never forget the day which my brother joined the army.请问这句话中的定语从句的引导词对吗?用when可以吗？that呢？ my uncle has joined the army since 1995这句话语法对吗?为什么不能用has been in? He has joined the army for ten years.和 He has been in the army for ten yearsHe has joined the army for ten years.和 He has been in the army for ten years.这两句话,哪个对?为什么? he joined the army last year It is 3 years_____he joined the army. he joined the army last year.变为含现在完成时的句子→→It __ __ a year __ he joined the army.空里填什么 John joined the army two years ago等于___two years since he joined the army He____for three years A)has joined the army B) has been in the army C) has been an army这题为什么选B不选C呢? It __four years since i joined the army.这里的is,为什么不用was呢? it is four years since I joined the army.这里的is,为什么不用was呢? my mother joined the army last years 同义句 he joined the army last year 改成现在完成时 He is a ____ .He joined the army last year. he joined the army last year 改成现在完成时 It is said _______ he has joined the army. Jack joined the army in 2006.(改为同义句)It ____ _____ three years _____ jack joined the army.