Founder & Lead Instructor, SkyGrammar

Zeshan Haider

Grammar instructor on a mission to make English feel simple. Clear lessons, real examples, zero jargon.

87 lessons written
11 specialties

Specialties

Verb Tenses Articles Prepositions Conditionals Modal Verbs Academic Writing Business English Spelling Vocabulary Writing Skills Beginner Grammar
From this author

Lessons by Zeshan Haider

December 8, 2025 Level: All

Okay vs Ok: When to Use Each One

Words like okay and ok seem tiny, but they appear everywhere in texting, school writing, conversations, workplace emails, and even when we talk to…

Open lesson