Why don't you TRY taking/to take sleeping pills if you can't sleep?
taking
I TRIED persuading/to persuade him to come with us but without success.
persuading
I REGRET telling/ to tell you that the trip tomorrow has been cancelled.
to tell
I REGRET paying/ to pay so much for this tent - it's not even waterproof!
paying
Our guide FORGOT mentioning/ to mention that the road was full of holes.
to mention
I have not FORGOTTEN seeing/ to see what hunters had done to those elephants.
seeing
The government MEANS taking / to take action to protect wildlife.
to take
Protecting wildlife MEANS changing / to change the law.
to change
