- Present perfect vs. simple past.
Exercise 3
a). 1- They/live/in Moscow/eight yeares.
-->They have lived in Moscow for eight yeares.
2-He/know/Paul/a long time.
-->he has know Paul for a long time.
3-I/work/ for UNICEF/1998
-->I have worked for UNICEF since 1998.
4-He/be/in hospital/six days.
-->He has been in hospital for six days.
5-She/have/a car/February.
-->She has had a car since February.
b). 1-How long have they lived in Moscow?
2-How long has he know Paul?
3-How long have I worked for UNICEF?
4-How long has been in hospital?
5-How long has she had a car?
Present Perfect vs. Simple Past
-->Present Perfect:
->The actions are unfinished or they have just finished at the moment;
->Time adverbs often used: For, Since, Just, Yet, Never, Ever.
--> Simple Past
->The actions are finished abd complete;
->Time adverbs often used: yesterday, last, ago, ...