I understand that [ didn't = did not]. But is it correct to write the following? Why didn't he come to work? Why did not he come to work? And can it be written as follows? Why he didn't come...
Is didn't or hadn't correct below? What is the difference? Please do not dock my pay as I was in the office but didn't brought my ID card. or Please do not dock my pay as I was in the office but
He said with didn't you don't use another past verb form. This is a good heuristic, though I don't recall anything about "double past" in school myself. But it still works. The technical way to say it is " do can take an auxillary/helping verb, but the only valid auxillary/helping verb for do is the plain or infinitive form (same as present tense)." She would hold my bicycle from the back to ...
I didn't go to (the) party I didn't went to (the) party. After the auxiliary verb DO the main verb must be in the plain form. This is the form you see in the dictionary. It does not have any tense. It is not past or present: *He doesn't goes to the gym. (ungrammatical - main verb in present tense) *He didn't saw the film. (ungrammatical - main verb in past tense) He doesn't go to the gym ...
Haven't and didn't are different time-wise, as you have guessed correctly. Haven't refers to the past up until now. So if you haven't done something, you haven't done it for a specific period of time (day, month, ever, etc.) Didn't refers to a specific point of time that has already passed. For example, if it is 7 PM, you could say "I didn't eat dinner at 6" or "I haven't eaten dinner yet ...