- I don’t know how I can get all this done.
I don’t know how to get all this done.
- I don’t know what paper I should put an ad in.
I don’t know what paper to put an ad in.
- I don’t know how much I should sell my tape recorder.
I don’t know how much to sell my tape recorder.
- I don’t know who I need to talk to at the newspaper office.
I don’t know who to talk to at the newspaper office.
- I don’t know where I can find out about the ad rates.
I don’t know where to find out about the ad rates.