A Letter

Titles can be anything but this sounds much better.

Yesterday, I felt no had no energy, because I worked very hard, and I always have pain in the backbecause my back was hurting.

If you want, you can say, "My back was hurting as usual."

In the evening yesterdayYesterday evening, I need to reread agian the cChapter tTwo of" l Lewood sScholl' by Jane Eyre.

you can also say, "the second chapter"
the name of the book should be in italics but I don't know how to do that here...

B, because I need to understand the nex word and use them in themore of the vocabulary and be able to use it in phrases.

Not quite sure what this means... if you have a specific assignment with the vocabulary or if you're just trying to understand it better for yourself. You'd say it a bit different if you have a specific assignment.

I

I think that's the best way to improve my writing skill.

I canceldecided not to watch a movie in English.

I tired theree times., but

I hate to spend time without get a good results.

Tell me, wWhat about you?

I feel you armust have very busy week at work.,

Or "I think you have.." or "It seems you have..." Different nuances.
Judging by your next sentence, "It seems you have...." is the best.

It's, is that right?

By the way, I sawhad a dream and I think it's a good omen.

Don't forget!,

If you want to have the "!" then switch the order: God is with you wherever you are, don't forget!

NB/ I have not use translator.