adv
1 in a serious way 严肃地; 庄重地; 启发性地; 严重地; 认真地
*speak seriously to her about it 跟她认真地谈谈这件事
* seriously ill, injured, etc 病得、伤得...很重.
2 (infml 口) (used at the beginning of a sentence when turning to a serious matter 用以将话题转到正经事上, 置于句首)
*Seriously though, you could really hurt yourself doing that. 说正经的, 你那样做可真要自讨苦吃了. =>Usage at hopeful 用法见hopeful.
3 (idm 习语) take sb/sth seriously regard sb/sth as important and worth treating with respect 认真对待某人[某事物]
*You can't take her promises seriously
*she never keeps her word. 她答应的事不必当真, 她从来说话不算数.
* I take this threat very seriously. 我认为这种威胁非同小可.

adv
very much or to a great degree
seriously ill/injured/damaged etc
　Was she seriously hurt?
　I'm seriously worried about Ben.
　Something was seriously wrong .
a) in a way that is not joking, especially because something is important
　It's time we talked seriously about our relationship.
b) [sentence adverb]spoken
used to show that what you say next is not a joke
　Seriously though , I think Toby likes you.
take sb/sth seriously
to believe that someone or something is worth your attention or respect
　As a teacher, it's important that the kids take you seriously.
　It's only a joke - don't take it seriously!
seriously?
spoken used to ask someone if they really mean what they have just said
　'The job's yours.' 'Seriously?'