How to say in my opinion, staying up late is bad for your health. in Japanese
1)
私私(watashi) (pn,adj-no) i/meのの(no) (prt) indicates possessive/nominalizes verbs and adjectives/substitutes for "ga" in subordinate phrases/indicates a confident conclusion/ indicates emotional emphasis/indicates question意見意見(iken) (n,vs,adj-no) opinion/view/commentではでは(deha) (conj,int) then/well/so/well then、、(、) Japanese comma夜更かし夜更かし(yofukashi) (n,vs) staying up late/keeping late hours/sitting up late at night/nighthawkはは(ha) (int) indicating a subject/yes/indeed/well/ha!/what?/huh?/sigh健康健康(kenkou) (adj-na,n) health/sound/wholesomeにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.悪い悪い(warui) (adj-i) hateful/abominable/poor-looking/detestable/amazing/fantastic/admirable/lovely/wonderful。。(。) Japanese period "."
