at once 和right away有什么区别请详细些

at once ,right now,right away和now的区别 at once &right away区别, at once 和right away有什么区别请详细些 at the moment , at once,right now,right away区别用法和意思。 right away=at once=right now?right away和at once都是立刻的意思,而right now不是现在的意思吗? 请问right now和right away都是at once的同义词吗? in no time,right away, right now, at once 有何差别,细讲 at once ,at first ,right away是否可以互换 at once right now right away at the moment 区别、比如用在哪个时态 right now 和 at once 的区别? he is doing homework___.A.right away B.right now C.at once D.immediately on the spots/at once/ right now/right away的区别 at once right now at once,in a second,right away的不同如题 Good morning,ladies and gentlemen.1．I will leave at once / right now / right away.2．I am leaving at once/ right now / right away.哪句更符合英美人表达习惯? at once 和 right now 可以互相转换吗？ 我想知道right now ,right away ,at the moment 和 at once 他们四个的用法时态方面,意思方面,用法方面,哪几个可以相同 我快要中考了 求姐姐哥哥帮忙了. —Jim is your brother in—No he is reading in the library at the moment.A.right away B.at times C.right now D.at once D【解析】考查短语辨析.at the moment 意为“立刻、马上” ,和 at once 同意,故选 D 项.at the moment 应该是