1. Lequel
Which?

2. If you have many possible options in front of you, you can use a form of lequel to indicate “which one?”

3. Lequel lequel: masculin/ le words laquelle: feminin/ la words
lesquels: masculin plural / les (le)words
lesquelles: feminin plural/ les (la) words

4. Putting Sentences Together
C’est le camion. Je fais référance à ce camion.
First, you need to figure out what you are replacing.
Le camion
Next, you need to see if there are any prepositions before it
Je fais référence à ce camion.
The lequel will always follow the preposition

5. NOW, there’s an à in front of where you are going to put the lequel and lequel is replacing a masculin (le camion).
à + lequel = auquel
Let’s put that first sentence first.
C’est le camion
then, put in the lequel - C’est le camion auquel je fais référance.

6. Main idea:
The idea here is to put to sentences together using “which.”
This is the boat/ I talked about the boat
This is the boat about which I spoke.
C’est le bateau duquel j’ai parlé.