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What are the differences between these clauses?
I1.I learned English for 2 years. I2. I learned English in 2 years. I3. I have learned English for 2 years. I4. I have learned English in 2 years.
I learned English for 2 years. I learned English in 2 years. I have learned English for 2 years. I have learned English in 2 years.
1.I learned English for 2 years. 2. I learned English in 2 years. 3. I have learned English for 2 years. 4. I have learned English in 2 years.
