Difference between "I spent a lot of time" and "I have spent a lot of time"
8496
“I saw a dog” vs. “I have seen a dog”
82366
"Have been having classes" or "have had classes for three months"?
58714
Simple Past vs. Present Perfect: "was" vs. "has been"
90495
Have lived vs. Have been living
111625
"There is a lot of food and fruit" vs. "there are a lot of food and fruit"
12708
"I use to", or "I used to"
31690
What is difference between "using" and "by using"?
75236
"have read" vs "read" - Is this simple present vs present perfect?
40495
What's the difference between "has been living" and "has lived"?
615
"I am done" or "I have finished" or "I am finished" or "I finish"
105840
What is the difference between have been and went?
9402
Difference in sentence meaning between present continuous and simple present constructions
92969
"got" vs. "have got"
127588
"Used to" vs "Use to"
72252
What is the difference between "used to" and "I was used to"?
151460
Difference between "was to . . ." and "was to have"
118270
Difference between "has + verbed" and "had + verbed"