动词和动
(3)        状态类，表事物所处的状态，如keep, remain, stand, lie, stay, prove, turn out等。(4)        外表特征类，表外表给人的印象，如appear, look, seem等。2．感官动词和使役动词        常考的感官动词有see, watch, notice, observe, hear, feel, find, catch等
He looked around and caught a man __________ his hand into the pocket of a passenger. A．put                 B．to be putting C．to put                 D．putting【解析】 D　catch sb doing sth“发现、发觉某人做某事”，doing sth为现在分词短语作宾语补足语。可接现在分词