1. SIMPLE PAST TENSE vs PRESENT PERFECT TENSE
CONCEPT & SIGNAL WORDS
Simple Past SIGNAL WORDS
Yesterday
A week ago
Last night
Last month
In 2007

2. Present Perfect SIGNAL WORDS
This week
This month
This year
Today
Since
For
Ever?
Yet?
No..yet
Already
Just
Recently
Lately

3. Present Perfect
Focus in actions
now have she/has/it have have have swum has not lost bought played visited

4. When? In 2007 Last year Yesterday 45 min ago
When did this happen ?
Past Simple
Focus is on the time
now
When? In Last year Yesterday 45 min ago

5. USE PAST TENSE 2 week ago 2012 2013 in the last two weeks
I was Born
I was a student
In 2012
A year ago
A month ago
2 week ago
A week ago
Yesterday
1999
2005
2012
2013
10 March
10 April
17 April
23 April
24 April
Today
in the last two weeks
in the last month
recently
never/ever
USE PRESENT
PERFECT TENSE