现在

now(adverb)

(at) the present period of time

马上

now(adverb)

at once; immediately

此刻

now(adverb)

(at) this moment

当时

now(adverb)

(in stories) then; at that time

现在

now(adverb)

because of what has happened etc

喂！，哎！（表示说明、警告、命令等，或表示不相信）

now(adverb)

a word in explanations, warnings, commands, or to show disbelief

由于

now(conjunction)

(often with that ) because or since something has happened, is now true etc