来自金颖的问题
done,tobedone,tohavebeendone,tohavedone,havingdone,havingbeendone的区别还有用法?救我……RT,还有啥时候用tobedone,啥时候用todo?如Thereisalotofworktodo.为什么不用tobedone?Withalotofworktodo,hewentou
done,tobedone,tohavebeendone,tohavedone,havingdone,havingbeendone的区别还有用法?救我……
RT,还有啥时候用tobedone,啥时候用todo?如Thereisalotofworktodo.为什么不用tobedone?Withalotofworktodo,hewentouttoplay.为什么不是tobedone?
