Direct and indirect questions.

 how can I contact her

how I can contact her

how do I contact her

where you found

where did you find

where found you

 how much did the sofa cost

how much cost the sofa

how much the sofa cost

it is going to take

is it going to take

it's going to take

How much time you have been living

How long you've been living

How long have you been living

what are you afraid

what you are afraid

what you are afraid of

what timeTom arrived

what time did Tom arrive

what time did Tom arrived

where is the nearest bank

where the nearest bank is

where the nearest bank was

if Mary likes fruit

Mary likes fruit

if does Mary like fruit

if where Ann's car is

where is Ann's car

where Ann's car is