Present: studies, studying
Past: studied
For an action in progress: studying
10. to ask
Present: ask
Past: asked
For an action in progress: asking
11. to make
Present: make, makes
Past: made
For an action in progress: making
12. to do
Present: do
Past: did
For an action in progress: doing
13. to came
Present: come
Past: came
For an action in progress: coming
14. to help