GrammarI现在完成时.ppt

* Grammar II Unit 1 Past and Present Grammar I The Present Perfect Tense We use the simple past tense to talk about what happened at a definite time in the past. past present Eddie was born four years ago. We use the present perfect tense to talk about an action that started in the past and continues to the present. Eddie has lived with Millie since he was born. Eddie has lived with Millie for four years. present past past present 4 years We also use the present perfect tense to talk about an actipon that happened in the past and has a connection with the present. present past Eddie has eaten my food. (Eddie ate the food and now Hobo has nothing to eat. We also use the present perfect tense to talk about an actipon that happened in the past and has a connection with the present. past present I have read this book many times. Daniel has watched the film Wheres Dad twice。 现在完成时的构成 现在完成时的肯定句 句型:主语（第一、二人称单、复数） + have +过去分词 We have lived in Nanjing for 10 years. e.g. I have finished my report. 主语（第三人称复数） +have + 过去分词 e.g. They have moved away. 主语（第三人称单数） +has +过去分词 e.g. He has been in Beijing for two months. 2. 现在完成时的否定句 句型主语+have/has+ not+过去分词 e.g. I have not seen Harry Potter yet. He hasn’t been to Tianjin since then. 3. 现在完成时的一般疑问句 句型 Have/Has+主语+过去分词 Have you….? Has he….? Yes, I have. Yes, he has. No, I haven’t. No, he hasn’t. 现在分词的构成 change +d Verbs ending in-e finish +ed Most verbs stop double the consonant+ed Short verbs ending in a vowel +a consonant carry -y+ied Verbs ending in a consonant +y A 规则动词的过去分词 finished changed carried stopped 现在分词的构成 try visited visit 过去分词 原形 过去分词 原形 plan move fit live study repair repaired lived moved tried fitted planned A 规则动词的过去分词 studied