Tom must've gone fishing alone.
Who will fill in for Tom when he is away?
Tom doesn't want to go with you.
Tom can't afford to buy a house.
Tom can't go to the toilet by himself at night.
I'm not exactly sure where Tom is.
I can't go there unless I go with Tom.
Tom until now has never, not even once, talked about what he thinks.
I wonder why Tom isn't at home.