¡¡¡¡£¨1£©Çé̬¶¯´Ê+ÐÐΪ¶¯´ÊÍê³Éʽ
¡¡¡¡£¨2£©Çé̬¶¯´Ê+ÐÐΪ¶¯´Ê½øÐÐʽ
¡¡¡¡£¨3£©Çé̬¶¯´Ê+ÐÐΪ¶¯´ÊÍê³É½øÐÐʽ
¡¡¡¡£¨4£©Ä³Ð©Çé̬¶¯´ÊµÄÌØÊâÓ÷¨
¡¡¡¡Ò»¡¢Çé̬¶¯´Ê+ÐÐΪ¶¯´ÊÍê³Éʽ
¡¡¡¡Çé̬¶¯´Ê+ÐÐΪ¶¯´ÊÍê³Éʽ¼´¡°Çé̬¶¯´Ê+ have + v-ed·Ö´Ê¡±£¬±íʾ¶Ô¹ýÈ¥ÐÐΪ»ò¶¯×÷½øÐÐÍÆ²â¡¢ÆÀÂÛ»òÅжϡ£
¡¡¡¡1. must have v-ed
¡¡¡¡must have v-ed ±íÊ¾ÍÆ²â¹ýȥijÊ¡°Ò»¶¨¡±·¢ÉúÁË¡£Æä·ñ¶¨ÐÎʽΪ£ºcan't / couldn't have v-ed£¬ ±íʾ¹ýÈ¥²»¿ÉÄÜ·¢ÉúijÊ¡£ÀýÈ磺
¡¡¡¡1£©Since the ditch is full of water£¬ it must have rained last night.
¡¡¡¡2£©You couldn't have met my grandmother. She died before you were born.
¡¡¡¡2. could have v-ed
¡¡¡¡could have v-ed ±íÊ¾ÍÆ²â¹ýȥij¶¯×÷¡°ºÜ¿ÉÄÜ¡±·¢ÉúÁË¡£ÀýÈ磺
¡¡¡¡1£©¡°The dictionary has disappeared. Who could have taken it£¿¡±
¡¡¡¡2£©¡°Tom could have taken it. He was alone yesterday.¡±
¡¡¡¡3.may / might have v-ed
¡¡¡¡may / might have v-ed ±íÊ¾ÍÆ²â¹ýȥijÊ¡°Ò²Ðí¡±·¢ÉúÁË¡£may ±È might ±íʾµÄ¿ÉÄÜÐÔÔÚ˵»°ÈË¿´À´ÉÔ´óЩ¡£ÀýÈ磺
¡¡¡¡I can't find my keys. I may / might have left them at the school yesterday.
¡¡¡¡4. ought to / should have v-ed ºÍ ought not to / shouldn't have v-ed
¡¡¡¡ought to / should have v-ed ºÍ ought not to / shouldn't have v-ed ÓÃÓÚ¶ÔÒÑ·¢ÉúµÄÇé¿ö±íʾ¡°Ô𱸡±¡¢¡°²»Âú¡±£¬·Ö±ð±íʾ¡°±¾Ó¦¸Ã¡¡±ºÍ¡°±¾²»Ó¦¸Ã¡¡±¡£ÀýÈ磺
¡¡¡¡1£©With all the work finished£¬ I should have gone to the party last night.
¡¡¡¡2£©You ought not to make fun of him. He is not the one you laugh at but learn from.
