1. Page 288, Exercise 6
This exercise is about using “for” or
“since” with the present perfect.

2. Use “for” with period of time:
We have studied the present perfect
for two hours.
I have lived in Oakland for six years

3. Use “since” with one specific
time:
We have studied the present perfect
since ten o’clock.
I have lived in Oakland for since
2006.

4. 1. My brother has been in the U.S.
since 1998.

5. Sometimes in this exercise, a
different word is missing:

6. 2. My mother has never been in the
U.S.
(We’re using the present perfect
here because of the word “never.”