Gerund or Infinitive?

1.    I am looking forward to seeing you.

2.    I arranged to meet them here.

3.    I wish to see the manager.

4.    He warned her not to touch the wire.

5.    Don’t forget to lock the door before going to bed.

6.    He tried to explain but she refused to listen.

7.    He decided to disguise himself by dressing as a woman.

8.     Would you mind showing me how to work the lift?

9.    After walking for three hours we stopped and let the others catch up with us.

10.    I am beginning to understand what you mean.

11.    The boys like playing games but hate to do/doing lessons.

12.    I regret to inform you that your application has been refused.

13.    I don’t allow smoking in my bedroom.

14.    I don’t allow my family to smoke in the house at all.

15.    Please go on writing I don’t mind waiting.