Объяснение:

2 flying

3 swimming

4 sitting

5 watching

6 using

7 hitting

8 taking

9 making

10 putting

11 walking

12 coming

Ответ:

fly-flying

swim-swimming

sit-sitting

watch-watching

use-using

hit-hitting

take-taking

make-making

put-putting

walk-walking

come-coming