I have seen many examples like "and I see the guy take my bag" or "I would watch him cry". But I wonder if it is correct to say "and I see the guy taking my bag" or "I would watch him crying". If yes, is there any difference?
Also, how would you say those sentences in past? "and I saw the guy took my bag"?..
Moreover, is it correct to say "you can experience different emotions as he sings"? or "as he is singing"? or "while he sings"? or "while he is singing"?
Could you please clarify these things for me. Thank you in advance.