Using a CATALYST can generally speed up or slow down the rate at which a chemical reaction occurs if thats what your asking.
It really depends. If you are talking about a specific detail that happened in the past, or an activity you used to do continuously in the past, you use imparfait or to describe a singular event that happened (Last year, last week, last Sunday etc.) you use passe compose avec avoir or etre as your auxiliary verbs.
The following are the verb endings for imparfait -
-ais, ais, ait, ait, ions, iez, aient
To form the passe compose avec avoir/etre you have the pronoun (je, tu, il, elle, nous, vous, ils, elles) followed by the auxiliary present tense of avoir/etre and the past participle.
Answer:
Explanation:
Bonjour,
Aujourd'hui nous allons au magasin Le Printemps à Paris. Nous payons beaucoup d'Euros, 3.295 €.
Trois-mille- deux -cent-quatre-vingt-quinze
2. veulent
3. peux
4. veut
5. dois
6. peut
9. peuvent
10. veux
If it can help : Pouvoir and Vouloir are kind of the same thing
je peux/veux
tu peux/veux
il/elle/on peut/veut
nous pouvons/voulons
vous pouvez/voulez
ils/elles p<u>eu</u>vent/v<u>eu</u>lent (there is a trap here : at the third person of plural the "ou" becomes "eu")
And Devoir :
je dois
tu dois
il/elle/on doit
nous d<u>e</u>vons (same, the trap is that for "nous" and "vous" the "oi" becomes "e")
vous d<u>e</u>vez
ils/elles doivent