1. PrÉpositions Avec Le temps
POUR, DANS, et EN

2. Review
Depuis means "since" or "for." It is used with a French verb in the present tense to talk about an action that began in the past and continues in the present.
J'étudie le français depuis 3 ans.    I've studied French for 3 years (and still do).
Pendant means "for" and refers to the entire duration of an action in the past or future, with no relation to the present.
J'ai étudié le français pendant 3 ans.    I studied French for 3 years (and then stopped).

3. review
Pendant followed by a noun means "during." In this sense, it is synonymous with durant.
J'ai vu un film pendant mon séjour.     I saw a film during my stay.
“Il y a” means "ago" and can only be used for things that are already completed. The verb in the sentence must be in the past and il y a must be followed by some reference to time.
Je suis arrivée il y a une heure.     I arrived an hour ago.

4. POUR
Pour means ___________. It can express the duration of an event ______________________. Note that _____________ could also be used in all of these.

5. exemples
   Je vais y habiter pour 2 mois.     I'm going to live there for 2 months.
   Il étudiera en Europe pour 3 ans.     He'll study in Europe for 3 years.
   Le projet est suspendu pour un an.     The project is suspended for a year.

6. Be careful…
Although the verb in the final example is not in the future, the use of pour indicates that the one-year suspension is either about to start or is currently underway. If the suspension had already occurred, you would have to use pendant:    
Le projet a été suspendu pendant un an.
  The project was suspended for a year.

7. Dans
Dans means _______. It is used to indicate a moment ___________ in which something will occur.

8. exemples Je partirai dans deux ans. I will leave in two years.
Le film finira dans une heure.
The film will end in one hour.

9. En
En means ______. It is used to indicate the ________________ needed to complete an action.

10. exemples Je complète le cours en dix minutes.
I complete the course in ten minutes.