刚才，马上，现在的英语词组有哪些和用法是什么

刚才，马上，现在的英语词组有哪些和用法是什么

just now 刚才 大多放句子结尾 用于一般过去时 just 刚才 一般放主语之后 用于一般过去时或现在完成时
at once/immediately 马上 大多放句子结尾
at present/now/at the moment/ nowadays 现在，现今 大多放句子开头或结尾

马上，现在，刚才的英语词组 马上 right away, at once i will do it right away. 现在 now he is singing a song now. 刚才 just now he bought a book yesterday.

马上：immediately, right away, at once, straight away, at the drop of a hat 现在：now, at present, today, nowadays, at the moment, current 刚才：just now, a moment ago

immediately, now, shortly, only just; a moment ago, a short while ago, just, straight away, at the drop of hat, on the spot,right away, at onceright now, just now