Ex 4 1 A making B to make (stop +
-ing = discontinue an activity,
stop + infinitive = in order to)
2 A phoning B to phone (try +
-ing = do something as an
experiment, try + infinitive =
make an effort to do
something difficult)
3 A to buy B buying
(remember + -ing = refers
back to the past, remember +
infinitiv)