- He go to great pain to explain the problem to us.
- He went to great pains to explain the problem to us.
- The theoreticians have to satisfy themselves that a hunting goddess is a plausible denizen in an agrarian pantheon and the pedagogues have a problem explaining her mythological activities to children who never seen a hunt.
- I look at this problem from a different viewpoint.
- Please explain this problem to me.
- She skirted round the problem of the high cost.