Read Detailed Explanation Here👇🏻 Let's learn the proper usage of "since" and "for" using real-life examples in this English Grammar lesson. The mistake is in the first sentence: ❌ "I know her *since last 4 years.*" This is incorrect because: - "Since" is used with a specific starting point (e.g., *since 2020* or *since last year*), not a duration. - "Last 4 years" refers to a duration, so "for" should be used instead. The second sentence is correct: ✅ "For the last 4 or 5 years." It properly u