besides, except, except for except(that), but BU用作介词时,常用于alno, nobody, who where等词后面;but不用句首 There is no one here but me Who but Tom would have done such a thing? All but /except the captain were rescuedbesides, except, except for, except (that), but ➢ But用作介词时，常用于all, no, nobody, who, where等词后面；but不用于句首。 ➢ There is no one here but me. ➢ Who but Tom would have done such a thing? ➢ All but / except the captain were rescued