Past Simple vs Present Perfect

We are about to start unit 7 which is about the Past Simple and the Present Perfect. Watch the following videos:

PAST SIMPLE

`[kml_flashembed movie="http://www.youtube.com/v/mW7Xd9xBWvY" width="425" height="350" wmode="transparent" /]`

PRESENT PERFECT

`[kml_flashembed movie="http://www.youtube.com/v/OwEW0cTgMew" width="425" height="350" wmode="transparent" /]`

1st CONDITIONAL

Conditionals are formed by two different sentences. The first is the condition preceded by IF, the second is the result of that condition.Have a look at the different tenses used in the First Conditional:

IF + PRESENT TENSE , PRESENT TENSE/FUTURE SIMPLE

Now have a look at the videos:

`[kml_flashembed movie="http://www.youtube.com/v/ow8FIHbwekU" width="425" height="350" wmode="transparent" /]`

`[kml_flashembed movie="http://www.youtube.com/v/CdHbkjCviC0" width="425" height="350" wmode="transparent" /]`

Comparatives and Superlatives

`[kml_flashembed movie="http://www.youtube.com/v/KLE5yPZa_Ow" width="425" height="350" wmode="transparent" /]`