Would you give someone a ride when you see someone who seems to needs something to ride during you driviing? (depending on my memory)

-> I will help somene who needs a transportation only when know him before, but if he is stranger for me, I never give him a ride because I think it is really dangerous for me.

Homework: If you see someone walking down the street who you think needs a ride, would you help him or her?

I will help someone who needs a transportation only when I know him before = I will help someone who needs transportation only if I know them already.