bythetimeyouarrivenight,shewillhavebeentypingforhoursbythetime后面可以加句子youarrivenight这前半个句子是做状语吧bythetime怎么用啊后面可以加什么成分阿

　　bythetimeyouarrivenight,shewillhavebeentypingforhours

　　bythetime后面可以加句子youarrivenight这前半个句子是做状语吧bythetime怎么用啊后面可以加什么成分阿