listen to,
listen to:
Fellow students，you should listen to what the teacher says carefully.
同学们，你们要认真地听老师讲课。
We listen to Radio Hong Kong every morning.
每天早上我们收听香港电台。
listen for:
Annie will come in any moment；we are all listening for her footsteps.
安妮可能随时来到，我们大家都在侧耳倾听她的脚步声。
We stood without the gate and listened for the sound of his voice，but in vain.
我们站在门外侧耳倾听他的说话声，但一点也听不到。
listen to:
Fellow students，you should listen to what the teacher says carefully.
同学们，你们要认真地听老师讲课。
We listen to Radio Hong Kong every morning.
每天早上我们收听香港电台。
listen for:
Annie will come in any moment；we are all listening for her footsteps.
安妮可能随时来到，我们大家都在侧耳倾听她的脚步声。
We stood without the gate and listened for the sound of his voice，but in vain.
我们站在门外侧耳倾听他的说话声，但一点也听不到。