I used to study relaxedly without much homework to do.However ,now endless homework burdens me with great pressure every day.
I used to take an active part in activities I am fond of in my spare time ,while now I have to give up my hobbies ,staying up late to study.
I used to have fun with my family and friends at weekends.But now Ihave to spend my weekends in my classroom.
family是集体名词,表集体中多个个体不用变复数
补充一下
i used not to have much homework to do and take study as a piece of cake.but now i have a lot of homework to do and that makes me stressful.
i used to attend activities i like after school,but now i have to study so long,even staying up all night,that i have to give up my own hobbies.
i used to spend time with my families and friends in the weekend.but now i have to take classes at that time.