Il ferait mieux de fermer.
1	Il	il	PRON	_	Gender=Masc|Number=Sing|Person=3|PronType=Prs	2	nsubj	_	wordform=il
2	ferait	faire	VERB	_	Mood=Cnd|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
3	mieux	mieux	ADV	_	_	2	advmod	_	_
4	de	de	ADP	_	_	5	mark	_	_
5	fermer	fermer	VERB	_	VerbForm=Inf	2	xcomp	_	SpaceAfter=No|Subject=SubjRaising
6	.	.	PUNCT	_	_	2	punct	_	_
