So of course there are multiple ways to say anything in any language here are just the way I would say it. I'm not fluent I Japanese so there may be better ways but these will work 1. Translating these sentences literally I am going to the store お店に行きます。 I went to the store お店に行きました。 You can also use the word 買い物 with する to say you went shopping I'm going shopping 買い物します。 I went shopping 買い物しました。 ２. Here are the ways I would translate your sentences I love eating ramen, but only in the winter. ラメンを食べるのが大好きですが、冬しか食べません。(I love eating ramen, but aside from winter I don't eat it) I would exercise, but I'm tired 運動したいけど、ちょっと疲れた。(I want to exercise, but I'm kind of tired )

ですね is used similarly to "isn't it" but sometimes just used to soften a sentence so its not so direct ですよ is harder to explain . it's used when you're really trying to make a point or emphasize something. Sometimes the よ behaves like an exclamation point when you're really trying to get something across , other times its just there to confirm a statement when someone you're talking to is unsure of something.