Verb Tense Exercise 6 Simple Past / Present Perfect
Since computers were first introduced to the public in the early 1980's, technology (change) a great deal. The first computers (be) simple machines designed for basic tasks. They (have, not) much memory and they (be, not) very powerful. Early computers were often quite expensive and customers often (pay) thousands of dollars for machines which actually (do) very little. Most computers (be) separate, individual machines used mostly as expensive typewriters or for playing games. Times (change) . Computers (become) powerful machines with very practical applications. Programmers (create) a large selection of useful programs which do everything from teaching foreign languages to bookkeeping. We are still playing video games, but today's games (become) faster, more exciting interactive adventures. Many computer users (get, also) on the Internet and (begin) communicating with other computer users around the world. We (start) to create international communities online. In short, the simple, individual machines of the past (evolve) into an international World Wide Web of knowledge.
Verb Tense Exercise 7 Present Perfect / Present Perfect Continuous
Начало формы
Robin: I think the waiter (forget) us. We (wait) here for over half an hour and nobody (take) our order yet. Michele: I think you're right. He (walk) by us at least twenty times. He probably thinks we (order, already) . Robin: Look at that couple over there, they (be, only) here for five or ten minutes and they already have their food. Michele: He must realize we (order, not) yet! We (sit) here for over half an hour staring at him. Robin: I don't know if he (notice, even) us. He (run) from table to table taking orders and serving food. Michele: That's true, and he (look, not) in our direction once.
Конец формы
Конец формы
Verb Tense Exercise 8 Present Perfect / Present Perfect Continuous
Judy: How long (be) in Canada? Claude: I (study) here for more than three years.
2. I (have) the same car for more than ten years. I'm thinking about buying a new one. 3. I (love) chocolate since I was a child. You might even call me a "chocoholic." 4. Matt and Sarah (have) some difficulties in their relationship lately, so they (go)
to
a marriage counselor. I hope they work everything out.
5.
John (work)
for
the government since he graduated from Harvard University. Until
recently, he (enjoy)
his
work, but now he is talking about retiring.
6. Lately, I
(think)
about
changing my career because I (become)
dissatisfied
with the conditions at my company.
7. I (see)
Judy
for more than five years and during that time I (see)
many
changes in her personality.
Verb Tense Exercise 5 Simple Past / Present Perfect
A:
Did you like the movie "Star Wars?"
B: I don't know.
I (see, never)
that
movie.
2. Sam (arrive)
in
San Diego a week ago.
3. My best friend and I (know)
each
other for over fifteen years. We still get together once a week.
4. Stinson is a fantastic writer. He (write)
ten
very creative short stories in the last year. One day, he'll be as
famous as Hemingway.
5. I (have, not)
this
much fun since I (be)
a
kid.
6. Things (change)
a
great deal at Coltech, Inc. When we first (start)
working
here three years ago, the company (have, only)
six
employees. Since then, we (expand)
to
include more than 2000 full-time workers.
7. I (tell)
him
to stay on the path while he was hiking, but he (wander)
off
into the forest and (be)
bitten
by a snake.
8. Listen Donna, I don't care if you (miss)
the
bus this morning. You (be)
late
to work too many times. You are fired!
9. Sam is from
Colorado, which is hundreds of miles from the coast, so he (see,
never)
the
ocean. He should come with us to Miami.
10. How sad!
George (dream)
of
going to California before he died, but he didn't make it. He (see,
never)
the
ocean.
11. In the last hundred years, traveling (become)
much
easier and very comfortable. In the 19th century, it (take)
two
or three months to cross North America by covered wagon. The trip
(be)
very
rough and often dangerous. Things (change)
a
great deal in the last hundred and fifty years. Now you can fly from
New York to Los Angeles in a matter of hours.
12. Jonny,
I can't believe how much you (change)
since
the last time I (see)
you.
You (grow)
at
least a foot!
13. This tree (be)
planted
by the settlers who (found)
our
city over four hundred years ago.
14. This mountain (be,
never)
climbed
by anyone. Several mountaineers (try)
to
reach the top, but nobody (succeed, ever)
.
The climb is extremely difficult and many people (die)
trying
to reach the summit.
15. I (visit, never)
Africa,
but I (travel)
to
South America several times. The last time I (go)
to
South America, I (visit)
Brazil
and Peru. I (spend)
two
weeks in the Amazon, (hike)
for
a week near Machu Picchu, and (fly)
over
the Nazca Lines.