If you speak Bengali, some English grammar rules will feel natural and others will feel confusing. These are the biggest differences to focus on first.
Bengali is SOV — the verb goes at the end. 'Ami bhat khai' means 'I rice eat'. In English this must become 'I eat rice'. Bengali speakers must restructure every sentence — the subject stays first but the verb and object swap positions.
Bengali has no articles. Definiteness is shown through word order and context. 'Manush-ta' (the man) uses a suffix '-ta' for definiteness — completely different from English articles.
Bengali verbs conjugate based on the social status of the subject — formal, familiar, and intimate registers each have different verb endings. English verbs have no social register — the same form is used for everyone.