A)
to send - sent
to drive - drove
to know - knew
to find - found
to build - built
to understand - understood
to speak - spoke
to buy - bought
to read - read
to lie - lay
to mean - meant
b)
to miss - missed
to appear - appeared
to move - moved
to change - changed
to collect - collected
to enjoy - enjoyed
to travel - travelled
to water - watered
to place - placed
to defend - defended
to play - played