When should I use: I did, had done or have done?
1863
How do the tens­es and as­pects in English cor­re­spond tem­po­ral­ly to one an­oth­er?
27613
Past Perfect Continuous/Past Perfect or?
79159
Proper usage of the word since
51992
"Same as I do" or "same as I have"
151634
Which one is correct? "has been taken already" or "has already been taken"
82982
past simple vs past perfect
140824
proper usage of didn't had or didnt have
58714
Simple Past vs. Present Perfect: "was" vs. "has been"
104245
did + present tense (or ) Past tense of the verb
96368
Simple Past vs. Present Perfect
142736
Difference between "are you done" and "have you done."
106677
Difference between "did save" and "saved"
53155
Using bare infinitive after 'does'
105806
Did + multiple bare infinitives in a question
10637
difference between "Have been" and "was"
112219
When should I use "by" in present participle?
114229
What is the difference between "were" and "have been"?