the difference in meaning.
1 a He's written a book.
b He's been writing a book.
2 a Who's eaten my chocolates?
b Who's been eating my chocolates
3 a She's never been to a wedding before,
b She'd never been to a wedding before
b I've been trying to call
5 a They been married for thirty-twe years!
b. They ve been married for thirty-five years!​

Present Simple-?(Wh+)Do/Does+Subject+Verb1?

Present Continuous-?(Wh+)Am/Is/Are+Subject+Ving?

Present Perfect-?(Wh)+Have/Has+subject+Verb3/Ved?

Present  Perfect Continuous-?(Wh+)Have/Has+subject+been+Ving?

Past simple- ?(Wh+)Did+  subject+ Verb1?

Past  Continuous-?(Wh+)Was/Were+  subject+  Ving?

Past Perfect- ?(Wh) Had+  subject+Verb3/Ved?

Past    Perfect  Continuous-?(Wh+)Had+  subject+been+Ving?

Future Simple -?(Wh+) Will +Subject+Verb1?

Future  Continuous-?(Wh+)Will   +subject+ be+ Ving?

Future  Perfect-  ?(Wh+)Will   +subject+have+  Verb3/Ved?

Future  Perfect  Continuous-?(Wh+)Will+  subject+have+been+  Ving? 

1. They go to school together in the morning, and always get up       at the same time. 

2. Tina is a good student, but she always   worries  about her grades. 

3. Have you visited any European countries? - Yes. I visited Spain and Italy two years ago. 

4. I went to Belgium last month. I  have never been there before. It's a beautiful country.

5. I love this film. I  have  already  seen  it four or five times. 

6. OK, I have repaired  the car. We can go. 

7. She had finished   lunch by the time we arrived. 

8 . Have you ever  been to Hollywood?

9. Would you mind  give me a hand? 

10. If she knew that he was coming, she would have prepared the guest room.