runfast,fast是什么意思

四年级module_5_unit_1__can_you_run_fast
i can run fast.
fast 快 run 跑得快 run fast he can run fast.
外研版四年级上册英语课件module5unit1can-you-run-fastppt
四年级上册英语课件-modle5 unit 1 can you run fast