Learn French: Je vous laisse importer ce fromage si vous avez la déclaration. - I let you import this cheese if you have the declaration.

You conjugate laisser for the person giving permission (here, Je) and use the infinitive for the action being permitted (here, importer). The person receiving permission (vous) is treated as the object of laisser.

Why is vous placed before laisse instead of right before importer?

When using laisser + infinitive, the object pronoun (like vous) must go before laisser. This is a special rule for verbs like laisser, faire, and verbs of perception like voir or entendre. In most other two-verb structures, the pronoun would go between the verbs, but not here!

Why do we use ce for 'this' instead of cet or cette?

Fromage is a masculine singular noun that starts with a consonant, so it requires ce. You only use cet for masculine words starting with a vowel or a silent H, and cette for feminine words.

Why is avez in the present tense if importing the cheese is a future possibility?