where to place did?

[Vaishnavi]

hi everyone!!
i have read many grammar books and know why "did" is used but when it comes to speaking i don't understand where to use it,so please someone help me out..:(

take care!!

[Alan]

Hi,

'Did' is the past tense of 'do' and is used both in negative and interrogative sentences in the past simple tense as in:

I didn't understand what he told me yesterday (negative)

Did you understand what he told you? (interrogative)

Alan
_________________
English as a Second Language
You can read my ESL story Present Simple

[Vaishnavi]

thanks a lot!!