Final answer:
The assertion is false; 'plusieurs' and 'quelques' can be followed by prepositions and partitive articles as required by the structure of the sentence.
Step-by-step explanation:
The statement that no article or preposition is used after plusieurs (several) and quelques (a few) is false. In French, plusieurs and quelques are often followed by a noun without an article, but they can be used with prepositions if the sentence requires it. For example:
- Plusieurs amis (Several friends) - No preposition or article is used here.
- J'ai parlé à plusieurs de mes amis (I spoke to several of my friends) - The preposition 'de' is used here.
Moreover, there are cases where a partitive article may follow plusieurs or quelques:
- Plusieurs des participants (Several of the participants)
- Quelques-uns des livres (A few of the books)