French Number Expressions There are several confusing pairs and difficult expressions related to French numbers. I.
The numbering system of the floors in a building may be difficult for American English speakers. Rez-de-chaussée Premier étage Deuxième étage
II.
American English
British English
First floor Second floor Third floor
Ground floor First floor Second floor
The meaning of premier changes depending on the preposition that precedes it. Au premier Au premier étage
At/On the first On the second floor
En premier En premier lieu
The first in a sequence In the first place, Firstly
De premier/première (prix, qualité)
The top (prize) or best (quality)
On the first floor
III. There are two French words for the adjective second (2nd): second and deuxième. They are essentially interchangeable, but there is a general, not always followed guideline: Second is often used when something is the second in a series of only two things. Deuxième tends to be used when there's a third, fourth, etc. Following this guideline allows you to add some interesting nuances to your words. La seconde guerre mondiale
World War II (the second and last)
La deuxième guerre mondiale
World War II (the second of how many?)
IV. There are two words for third and fourth. troisième un tiers
third (in a series) one third
quatrième un quart
fourth (in a series) one fourth
For 5 and up, the same word is used for both fractions and ordinal numbers. V.
In economics, un trimestre means three months. Its English equivalent is a quarter.