Gopher Singer and how to say "Although..." sentence in Chinese

There is an exercise in this video. It's about how to say "Although (phrase A) ,(phrase B)   . "  in Chinese.
The corresponding Chinese sentence structure is "虽然(phrase A)  , 但(phrase B)。  "
 Such as,
Although he is very old, he is still strong and healthy.
suīrán tā yǐjīng shàng le niánjí , dàn tā yījiù hěn jiànzhuàng
虽然他已经上了年级，但他依旧很健壮。

Although they tried their best, they still lost that game.
suīrán tāmen jǐnle quánlì , dàn hái shì shūdiào le bǐsài
虽然他们尽了全力，但还是输掉了比赛。

If you like, please try to translate the following sentence into English:
suīrán wǒmen jiākuài le sùdù , dàn hái shì méiyǒu zhuīshàng tā
虽然我们加快了速度，但还是没有追上他。

suīrán zhè yīfu hěn shíshàng, dàn bùshìhé shàngbān de shíhou chuān
虽然这衣服很时尚，但不适合上班的时候穿。

or you may try to translate the following sentences into Chinese:

Although I took the earliest train, I was late for that meeting.

Although she still loves him, she decides to leave him.