Floating quantifier

Floating quantifier is a quantifier that is not immediately near the NP it quantifies. French tous (all) is the exemplary case:

(i) a Tous les étudiants ont lu ce livre All the students have read that book b Les étudiants ont tous lu ce livre

In (i)a the quantifier tous immediately precedes the NP les étudiants it quantifies, but in (i)b tous has 'floated' off, as it were, into the sentence. Sportiche (1988) has claimed that tous in examples such as (i)b is stranded in the (VP-internal) D-structure subject position.

Link
Utrecht Lexicon of Linguistics