精选优质文档-倾情为你奉上.Teaching aims: 1. Knowledge: a. The structure of the present perfect tense.b. The usages of present perfect tense.2. Ability: a. Enable students to use the correct tense in their writing and speaking.b. Enable students to use the right words in the present perfect tense. 3. Feelings and attitude: a. Let the students know the importance of English grammar. b. Try to build up students confidence in themselves c. Encourage students to speak English in pub