1. UNIT 17 Present Perfect 現在完成式

2. UNIT 17 Present Perfect 現在完成式 Already and Yet

3. UNIT 17 Present Perfect 現在完成式 Already = 已經 Yet = 尚未

4. Affirmative Statements: Already 肯定 敘述 They have already mailed the invitations. They have already gotten her invitation.

5. Affirmative Statements: Already 肯定 敘述 She has already mailed the invitations. She has already gotten her invitation.

6. Negative Statements: Yet 否定 敘述 They haven’t mailed the invitations yet. They haven’t gotten her invitation yet.

7. Negative Statements: Yet 否定 敘述 She hasn’t mailed the invitations yet. She hasn’t gotten her invitation yet.

8. Yes / No Questions: Yet 疑問 Have they mailed the invitations yet ？ Have they gotten the invitations yet ？

9. Yes / No Questions: Yet 疑問 Has she mailed the invitations yet ? Has she gotten her invitation yet ?

10. Short Answers Affirmative 肯定短回答 Yes, they have. Yes, she has.

11. Short Answers Negative 否定短回答 No, they haven’t. Yes, she hasn’t.

12. Let’s take a look at page 195..