1he can't come with us because he (have) a broken arm. 2 (your friend/know) how to sky surf? 3 a: (you/enjoy) the trip? b: yes, thanks. it's great. 4 a: where's tim? b: he (look) at the view from the bridge. 5 i (love) bungee jumping. 6 we (realise) it's quite a dangerous sport. 7 he (not/learn) to snowboard. 8 they (hate) all extreme sports. 9 they (not/understand) why we go mountaineering. 10. he (think) about his sister. she's taking her driving test today.