Present Perfect
作者：Me Me
1. Key Words
1.1. yet
1.2. already
1.3. ever,never
1.4. just
1.5. So far
1.6. for ( period of time)
1.7. since ( starter time)
2. When to use
2.1. 1.To describe an experience
2.1.1. ((I have travelled the world))
2.2. 2-to describe accomplishment
2.2.1. ((I have finished my course))
2.3. 3-Continuing action that started in the past
2.3.1. ((I have finished my H.W))
2.4. 4-To describe a change over period of time
2.4.1. (( House prices have increased))
3. Pronoun
3.1. it
3.1.1. has
3.1.1.1. V3
3.2. He
3.2.1. has
3.2.1.1. V3
3.3. She
3.3.1. has
3.3.1.1. V3
3.4. I
3.4.1. have
3.4.1.1. V3
3.5. They
3.5.1. have
3.5.1.1. V3
3.6. We
3.6.1. have
3.6.1.1. V3
3.7. You
3.7.1. have
3.7.1.1. V3