为什么I came to China for the second time this spring 的句子中用this spring ,而不用in this springRT.

I have come to China for three years.为什么不是I have came to China for three years I heard she came back to china last night.hear sb do sth .为什么hear后要接 came 不用come ever since she came to china,为什么came不用第三人称单数形式呢? He came to China to study Chinese history.为什么用to study? I have been in china six months等于 （ ）（ ）six months since I came to china 为什么I came to China for the second time this spring 的句子中用this spring ,而不用in this springRT. she came to China to work in 2008 China和work之she came to China to work in 2008 China和work之间不是加of吗?为什么要加to When did you come to China?I came on ______________.有monday、september、12怎么填空 I Came To Play 把下列句子变为一般疑问句 ①I was six last year ②We came to china yeaterday ③He runs very f把下列句子变为一般疑问句 ①I was six last year ②We came to china yeaterday ③He runs very fast ④She climbed a hill ⑤They ha he,back,china,to,then,came 排列 she came to china _____5.填介词 came,he,china,back,yesterday,to 排列 When do you came to China? came,he,china,back,yesterday,to 排列 jane came to China five years ago Came to China in 1983的意思 lucy spent three years ______Chinese before she came to China 为什么填learning 求解释