How to say if i had been with you, i could have helped you. in Japanese
1)
もしもし(moshi) (int) excuse me!私私(watashi) (pn,adj-no) i/meがが(ga) (prt) indicates sentence subject/indicates possessive/but/however/still/and君君(kun) (pn) you/buddy/pal/monarch/ruler/sovereign/masterとと(to) (prt,conj) if/when/and/with/particle used for quoting/quoting particle/ promoted pawn/ indicates question一緒に一緒に(isshoni) (adv) together/at the same time/in a lumpいい(i) (prt) strengthens a question, assertion, etc.たならno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verb、、(、) Japanese comma君君(kun) (pn) you/buddy/pal/monarch/ruler/sovereign/masterをを(wo) (prt) indicates direct object of action/indicates subject of causative expression/indicates an area traversed/indicates time over which action takes place/indicates point of departure or separation of action/indicates object of desire, like, hate,助け助け(tasuke) (n) assistanceることができただろうno dictionary result, likely a conjigated verbno dictionary result, likely a conjigated verbにに(ni) (prt) indicates such things as location of person or thing, location of short-term action, etc.。。(。) Japanese period "."
