"Until now I didn't realize that..." vs. "until now I hadn't realized that..."
99100
"I had not noticed." but "I did not know."
12708
"I use to", or "I used to"
71914
"Didn't use to get" or "Didn't used to get"?
122849
When do you use “learnt” and when “learned”?
10637
difference between "Have been" and "was"
72252
What is the difference between "used to" and "I was used to"?
10955
Past simple vs present perfect
15527
Simple Past Vs Past Continuous
141333
"A year ago" versus "a year back"
57204
present perfect vs past perfect
54106
"I assume you know" vs. "I am assuming you know"
24661
"had they known" or "if they had known"
150181
"Covered with" vs. "covered in" vs. "covered by"
140726
"really not" vs "not really"
19721
'He don't have knowledge ' vs 'He doesn't have knowledge'
28837
What is the difference between "Have you seen this?" and "Did you see this?"
6340
"yet" vs. "already" with present perfect