英语翻译，急求啊··！！！~

Be confident and we have the belief to build up self-confidence.
Being unable to concentrate on our study contributes to our falling behind.
3. What is worst is that we haven't formed a good learning habit for quite a long time.
或：The worst thing is that we have not been able to form a good learning habit for quite a long time.

Be confident, and have the belief to create confidence.
it also contributes to the lagging-behind that we did't concentrate on the study.
the worst thing was that we didn't form good study habits.