I gave my best responses below. Which are wrong? Thanks.<br/><br/>1) He lie in wait for his prey. (Wrong)<br/><br/>2) He lies in wait for his prey.<br/><br/>(Correct.)<br/><br/>3) He lay in wait for his prey. (In the past; as much as just a second ago.)<br/><br/>4) He lay down. (a second ago)<br/><br/>5) He lies down. (Now)<br/><br/>6. He lie down. (Wrong)<br/><br/>7. He lies (rests) or lays (places) his head on the pillow-- are both correct? They each technically make sense in their own right, no?)<br/><br/>8) the dangers that lie ahead (OK?)<br/><br/>9) the danger that lies ahead<br/><br/>(OK?)