After my wife has finished shopping at the supermarket, I meet her there and help carry the groceries home.
I always help my wife carry home the groceries from the supermarket once she's finished shopping.
ーAfter my wife is finished shopping at the supermarket, I meet her there and help carry the groceries home.
「妻がスーパーで買い物が終わったら、彼女をスーパーに迎えに行って家まで食料品を運ぶのを手伝います」
to meet someone で「人に会う・人を出迎える」
to help carry ... で「…を運ぶのを手伝う」
ーI always help my wife carry home the groceries from the supermarket once she's finished shopping.
「妻が買い物を終えたら、スーパーから食料品を家に運ぶのを手伝います」
to finish shopping で「買い物を終える」
ご参考まで！
カナダ 
