Which are correct: 1-I read the poem so many times that I learnt it by heart. 2-I read the poem so much that I learnt it by heart. 3-I read the poem until I learnt it by heart.
Which are correct: 1-I read the poem so many times that I learnt it by heart. 2-I read the poem so much that I learnt it by heart. Change "much" into "often", and you have another good sentence. 3-I read the poem until I learnt it by heart.