I forgot to include a few more sentences I would like you to check, too.
1) Pamela is embarassed at his giving her presents though she thinks there is no harm in what he said to her.
She is going to put aside (?) vanity. Being a virtuous girl, she is not going to show off all her new clothes. (?)
2) Her father warns her not to be on her guard and not to let (herself?) be tempted by Mr B.
He believes Mr B keeps giving her presentes because he wants to seduce her by impressing (?) upon her.
3) He also recommend she take Mrs Jarvis's advice in every thing.
1. fine
2. herself and omit "upon" = impressing her.
3. everything?
Sra
Here are a few suggested revisions to your sentences:
1) Pamela is embarrassed by his giving her presents, although she believes there is no harm in what he said to her. She is determined to set aside vanity and, as a virtuous girl, she will not flaunt all her new clothes.
2) Her father warns her to remain cautious and not to allow herself to be tempted by Mr. B. He believes that Mr. B keeps giving her presents with the intention of seducing her by making a strong impression on her.
3) He also advises her to heed Mrs. Jarvis's advice in everything she does.
To check these sentences, you can use grammar and spelling check tools available in word processing software such as Microsoft Word or online grammar checkers like Grammarly. Reading your sentences aloud or having someone else proofread them can also help catch any errors or make improvements.