Answer:
Speak- Spoke
Knit- Knitted
Keep- Kept
Give- Gave
Need- Needed
Send- Sent
Swim- Swam
Sleep- Slept
Think- Thought
Wake- Woke
Catch- Caught
Make- Made
Stay- Stayed
Pay- Paid
Do- Did
Run- Ran
A good rule to think of is that with inifinitives, you can put "to" in front of them and it'll make sense. "to run, to think," etc. but past tense words can be spelt in a lot of different ways so it takes some practice to remember them all.