请教一个问题:上面的if从句可以没有谓语动词吗,如果想要在作文中,运用类似语句来使得句子不那么普通,有哪些基本的用法和规则。句子出处:If its message were confined merely to information-and that in itself would be difficult if not impossi...
...ot to speak loudly in the classroom).可不可以说成1. teacher told us (that don't speak loudly in the classroom)或者2.teacher told us(that we should not speak loudly in&nbs...