(if/when/because+主语)+doing.相同主语.这个是什么语法?

(if/when/because+主语)+doing.相同主语.这个是什么语法? ____ Lily was listening to some music,it began to rain.A.When B.Because C.Then D.If还有就是when可以用作进行时吗?主语、谓语的时态呢? _____ he has not enough money. he wants to save some if when or because 那个if when or because 关于兴趣的英语作文every,my hobby,because,when,since,think,if可选用 if,when和because都引导状语从句,它们的用法各是什么? Wash your hands ______you have dinner.A.if B.when C.before D.because 用if,because,when,before,as soon as等连接的句子（20句） I Iiked sports____I was young A because B while C if D when 为什么.. Do you mind___I use your computer?A.while B.when C.if D.because It does not matter if I missed my train,because there is another later.请问：if 在这里引导的是主语从句吗?意思是“是否”吗?if 不是不能引导主语从句吗? __ it was so cold, he went out without his coat. A Although B If C When D Because 为什么?__ it was so cold, he went out without his coat.A Although B If C When D Because 为什么? He made it clear____he was not interested in this subject.A.if B.because C.that D.when ( )my mother came back ,I was playing video games with TomA.if B.when C.as soon as D.Because It was already ten o’clock __he got back home.Awhile B when C if D because ___i was getting ready for a picnic,she was listening to music.A when B if C while D because They kept trying _____ they must have known it was hopeless.A. if B. because C. when D. where ben was unhappy ____he got a c in the math test 1.because 2.before 3.if 4.when The machine will continue to make much noise__we have it repairedA when B because C if D unless