if you are under danger,you can ask me for help改病句

1 under -> in ( in danger 固定用法‘ 陷入困境）
2 要,即：swim-> swimming
加油!不明白再问!

if you are under danger， you can ask me for help. -> if you are in danger， you can ask me for help. (in danger "在危险中"，固定词组)

they also like swim for a long time every day.-> they also like swimming for a long time every day。(like doing 喜欢做什么)

合肥经济后果