Modal Simple vs Simple Past
24744
The habitual past "would" versus "simple past" tense
96368
Simple Past vs. Present Perfect
65426
Difference between Simple Past and Past Perfect
22092
Why do we use 'did' with questions using the simple past tense?
66188
Mixing past tenses in the same sentence
108239
Is " have to" a modal verb?
110190
tense agreement (simple past tense after past perfect tense)
91575
Past simple vs past perfect; British- vs American English
2182
vs. . Which to use?
110717
Present Simple vs Present Progressive
23177
Tense change: previous actions on something that's currently true
141333
"A year ago" versus "a year back"
5719
Would it be possible to change past perfect into simple past
42961
Simple past or past perfect with "by" and years
3725
Why modal on modal is bad?
9402
Difference in sentence meaning between present continuous and simple present constructions
153098
Aspect (simple, perfect and progressive): What are the differences?