Ivan__to Taiwan twice since he moved to Japan lase year.[1]had been [2]has been,[3]was [4]is.本題用since 代替before考的重點又在那?
2 則回答
這題就不一樣了，關鍵在since表時間序列持續發生，其配合的主要子句就必須使用現在完成式了，Ivan has been to Taiwan twice since he moved to Japan lase year.
2. is the answer, because the word "since" means when the time he moved to Japan already travel to Taiwan for two times, the time still moving/continuing