Leave go buy swim laugh sit close Ing (double consonant) -ing e ing

Question

Leave go buy swim laugh sit close

Ing (double consonant) -ing

e ing

Answer 1

Leaving

Going

Buying

Swimming

Laughthing

Sitting

Closing(?)

Answer 2

Я так понял нужно образовать инговую форму? Leaving going buying swimming laughing sitting closing