表原因的时候 because for since 有什么区别 Mother does not allow him to play computer games ,but she is afraid that it will be bad for his syudies.答案是把but 改成because .请问可以改为for 或since 如果不行,为什么?也即

for、because .because of .since 表原因的区别? for ,because of ,now that表示原因的时候的用法 as,for,since,because,because of,by表原因时的区别与用法是什么?如题 表示原因的单词as for since because 的区别 because for as since表原因时强弱比较,要自己确定的那种答案 表原因连词的用法及区别for as since because whilenow that because,for,since请举例说明表示原因的区别 表原因的时候 because for since 有什么区别 Mother does not allow him to play computer games ,but she is afraid that it will be bad for his syudies.答案是把but 改成because .请问可以改为for 或since 如果不行,为什么?也即 because for as since表原因时强弱比较 for后面能不能接句子for表原因的时候接句子,是起连词作用? The doctor ___(seng for) because Jack's grandpa was ill原因 as,for,since,because,because of,by表原因时的区别与例句是什么例句要有详细的语法解释 for&because的用法 nothing compares to you,______you are the most beautiful I've ever seenA.as B.for C.because D.since选哪个呢?为什么?在帮人家不可的时候碰到这个问题,我觉得选A 不过讲不出原因, FOR和BECAUSE的区别(在表示原因的情况下)` because ,because of ,since ,for的区别 since,for,because,in that在表示原因时的区别是什么? 英语中表示原因的词及用法如because,for