Period3Grammar----Reviewofverbforms(1)

Period 3: Grammar—Review of verb forms (1)
Objectives
●To review present simple, present continuous, present perfect and future reference; for and
since with present perfect
●To use the present perfect tense: for or since
Procedures
▇Reviewing Present simple, present continuous, present perfect
■Using the Present Perfect Tense: FOR or SINCE?
We use Present Perfect tense to talk about action which started in the past and continues up to the present.
Examples
I have had this computer for about a year.
How long have you been at this school?
I haven't seen Julia since September.
Tip! For other uses of the Present Perfect tense, see the Present Perfect Tense - When To Use.
We use for with a period of time, for example: a few days, half an hour, two years. We use since with the time when the action started, for example: last year, June 8, I met you.
Each of these present perfect sentences contains a time expression. Each time expression is a length of time (which requires FOR) or a starting time (which requires SINCE).
1 Maya has been a professional ________ 1989.
2 So far, it has rained ________ five hours.
3 I haven't been snowboarding ________ last winter.
4 Jo has been a student here ________ March.
5 The beaver has been an emblem of Canada ________ many years.
6 Cougars have almost disappeared from the Victoria area ________ humans settled here.
7 Mary has kept a diary ________ she was ten years old.
8 First Nations people in British Columbia have told stories about the eagle ________ hundreds of years.
9 The Canadian two-dollar coin (or toonie) has been in circulation ________ 1996.
10 They've been married ________ twenty-five years.
11 I haven't phoned home______ Christmas.
12 We've been here__________ nine o'clock.
13 I have worked for International House__________ more than eight years.
14 I haven't visited my home town_________ I left school.
15 I haven't been to the cinema__________ ages.
16 I have studied non-stop_________ 9.15.
17 I have had a driving licence_________I was eighteen.
18 She hasn't had a day off _________1999.
19 Johan has been in England__________more than two weeks now.
20 Peter has been my best friend_________ we were nine.
■Closing down by deciding if you need for or since with these time expressions.
---for/since last weekend
---for/since ten seconds
---for/since Christmas Eve
---for/since a decade
---for/since I finished school
---for/since a couple of days
---for/since my birthday
---for/since a long time
---for/since ten centuries
---for/since the 70s
---for/since I was a boy
---for/since August
---for/since the last month
---for/since fifteen years
---for/since the accident
---for/since then
---for/since we bought this house ---for/since last month
---for/since a millennium
---for/since I met you。