疲(つか)れ()て()い()る() tsukareteiruなら naraそんなに sonnani一(いっ)生(しょう)懸(けん)命(めい) isshoukenmei勉(べん)強(きょう) benkyouし shiなくてもよい nakutemoyoiです desu。 If you're tired, you don't have to study so hard. Literal Tired [if-なら] that-much hard study [not have to-なくてもよいです]. ~なくてもよいです means 'you don't have to' — polite permission not to do something. そんなに一生懸命 means 'so hard, that earnestly.' studyingtiredness~なら (conditional)~てもいい (permission)
疲(つか)れ()て()い()る() tsukareteiruなら naraそんなに sonnani一(いっ)生(しょう)懸(けん)命(めい) isshoukenmei勉(べん)強(きょう) benkyouし shiなくてもよい nakutemoyoiです desu。 If you're tired, you don't have to study so hard. Literal Tired [if-なら] that-much hard study [not have to-なくてもよいです]. ~なくてもよいです means 'you don't have to' — polite permission not to do something. そんなに一生懸命 means 'so hard, that earnestly.' studyingtiredness~なら (conditional)~てもいい (permission)