《牛津版高二英语 Unit 1 Grammar》.pptVIP

Unit 1 Grammar Overview of tenses1:present tenses Present tenses are used to talk about the present time. These tenses include: simple present present continuous present perfect present perfect continuous we use the simple present tense to talk about things that: 1.I am at a comedy show. 2.The sun rises in the east. 3.The Academy Award show is on television every year. 4.Every time a prop comedian tells a joke, he or she uses a thing, called a prop. We use the present continuous tense to talk about actions that: 1.are happening or in progress now. are being planned now, but will happen in the future. 2.happen repeatedly, used with always, usually with a negative connotation. We use the present perfect tense to talk about how the past and present are connected. We use it for: 1. experiences that are repeated. 2.things that happened in the past, but have an effect on the present . 3.things that started in the past and are still happening now. 1. experiences that are repeated ① He has hosted the show eight times. ② Bill Crystal has been in many films and television shows. 2. things that happened in the past, but have an effect on the present ① Doctors have found that people who laugh a lot live longer! ② Some stand-up comedians have became famous as television and film actors later on in life . 3. things that started in the past and are still happening now. ① People have always enjoyed laughing . ② Comedians have always told jokes and performed comic acts. Can you tell me the tenses of the next two sentences? 1. Doctors have been researching that question. 2.The curtains finally open—the audience have been waiting an hour for the show. We use the present perfect continuous tense to talk about actions that started in the past, have lasted up to now and will probably continue to happen. Finish the sentences by writing the correct forms of tenses. 1.I will tell