Indirect questions

I don't know why... so unhappy

• is he always

• he is always

• whether he is always

• whether is he always

Do you have any idea when ...

• the results will be published

• will the results be published

• will be the results published

How many people ... for the party?

• did you call

• you called

• you call

• called you

I'd like to know ... for the experiment.

• if can I use a new product

• whether could I use a new product

• whether can I use a new product

• whether I can use a new product

What ... buy this overpriced gadget?

• did make you

• has make you

• made you

• make