I'm learning Mandarin from the New Practical Chinese textbook series by Taipei Language Institute Press, and there are a few mentions of "FVs" as follows:
- 你去過台中沒有？ - Explanation: 過 is suffixed to the FV; 了, when included follows 過.
- 你吃過飯了嗎？我還沒吃。- Explanation: Negatives are formed in the same way as for 'Completed Action' 了: 還沒 is inserted before the FV, and 過 is deleted
- 吧 - brings Objective in front FV (sic)
However, the textbook's grammar key doesn't mention what "FV" stands for. Presumably, the V is for Verb.
One of my teachers mentioned that it stands for "functive verb", but I haven't been able to find any other references to that term online.
Another teacher mentioned that it's possibly the same as action verbs (動作動詞) based on the explanations in the textbook. Specifically, she mentioned that 吧 can be used with action verbs in the sentence pattern Subject 吧 Object Verb, but 吧 can't be used the same way with equative verbs (e.g. 是), stative verbs (e.g. 長) or other non-action verbs (e.g. 知道). The textbook uses "AV" as an abbreviation for "auxiliary verbs", so "FV" may be based on some synonym for "action".
Is an "FV" some standard abbreviation in English explanations of Chinese grammar? What does it stand for? Particularly looking for answers with book/paper citations.