have (some) problems He had some problems reading without his glasses.
have a difficult time She had a difficult time hiking up the mountain.
have a good time They had a good time snorkeling.
have a hard time She had a hard time explaining the situation.
have a problem Debbie had a problem understanding his accent.
have an easy time She had an easy time selling the delicious cookies.
have difficulty Wanda had difficulty translating the letter by herself.
have fun The had fun skiing.
have no difficulty They had no difficulty finding a discount flight to London.
have no problem Francis had no problem getting from the airport to the hotel.
spend one’s time He always spends his time working out at the gym.
waste one’s time She always wastes her time playing video games.

it’s no use/ it’s no good                                             There’s nothing you can do about the                                                                                                         situation, so it’s no use worrying about it

There’s no point in                                                     There’s no point in having a car if you                                                                                                     never use it

It’s (not) worth                                                            It’s not worth taking a taxi.

Be busy                                                                          She was too busy doing other things.