1. In the old days, companies grew slowly.
5. Mike works for Microsoft. He has been with the company for three years now. / Mike has worked at head office since June.
3. Jack Welch took over as CEO of GE in 1981.
4. He was CEO for 20 years and retired in 2001.
2. The company has implemented new sales strategies so, sales have increased.
c) We use the present perfect to show the result of an event without saying when it happened.
e) We use the past simple with “for” when the activity is finished.
d) We use the present perfect with “for” and “since” to talk about things that started in the past but continue up to the present.
a) We use the past simple to talk about things that belong to the past and are finished.
b) We use the past simple when give the specific time that an event took place.
