This document discusses the proper use of the words "since" and "for" with the present perfect tense. It explains that "since" is used for events that began in the past and are still ongoing, providing specific examples. "For" is used for continued actions in an unspecified past time frame. The document provides example sentences for each and then an exercise with multiple choice questions to reinforce understanding of when to use "since" versus "for."

1. Since or for
Samar Ayed
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2. We use SINCE and FOR with the present
perfect
• Since
• Used for the event appeared in the past and is still on
going (specific) .
• For Example.
• I've lived here since March.
- I've been here since 9.00 this morning.

3. Time clauses
• I've studied English since I was at
university.
• (I have/I've) studied English since I
started in a secondary school.

4. For
• Continued to act in the past (unspecified)
• For Example
• (I have/I've) lived here for 9 months .
• (I have/I've) lived in Hong Kong for
twenty years.
• (He has/He's) worked for Microsoft for
two years.

5. Exercise
• 1.I haven't worked _____ a month.
• A. since
• B.For
• 2. They have been ill _____ Monday.
• A. Since
• B. For

6. Exercise
• 3. We've been friends with Fred _____
decades.
• A. since
• B. for
• 4. We've lived here _____ seventeen
years.
• A. since
• B. for

7. Exercise
• 5.My boss has been away _____ half a
day only.
• A. since
• B. For
• 6. I haven't slept _____ 48 hours.
• A. since
• B. for

8. Exercise
• 7. We have received no news _____ 5:30
pm.
• A. since
• B. for
• 8. We haven't seen Mary _____ the party.
• A. since
• B. for

9. Exercise
• 9.You haven't smoked _____ two months.
• A. since
• B. for
• 10. Mandy has been ill _____ Monday.
• A. since
• B. for

10. • Finally . I hope you enjoy and understand
every thing .