My exsams after 2 weeks help me

My exsams after 2 weeks but i would not to read my book i can't understsnd any thing!!
naw i have 1 question
haw i can find the different between hav / has / had ???
and
do / does / did

i just know had and did = past
but i can't understsnd

thanks

[dilodi83]

Originally Posted by Death Flower

My exsams after 2 weeks but i would not to read my book i can't understsnd any thing!!

naw i have 1 question
haw i can find the different between hav / has / had ???
and
do / does / did

i just know had and did = past
but i can't understsnd

thanks

Hey but it's very simple!! have and has are present simple of to have and so and does are present simple of to do; had and did are the simple past of to have and to do...what's the matter with you??

[Tdol]

Today I have,
Yesterday I had.

Look for the time reference- in an exam to test the tense there must be some time reference or clue to tell you whether it's present or past.