It sounds as though his health has deteriorated significantly.
1	It	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	2	nsubj	2:nsubj	_
2	sounds	sound	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	0:root	_
3	as	as	SCONJ	IN	_	8	mark	8:mark	_
4	though	though	SCONJ	IN	_	8	mark	8:mark	_
5	his	his	PRON	PRP$	Case=Gen|Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	6	nmod:poss	6:nmod:poss	_
6	health	health	NOUN	NN	Number=Sing	8	nsubj	8:nsubj	_
7	has	have	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	8	aux	8:aux	_
8	deteriorated	deteriorate	VERB	VBN	Tense=Past|VerbForm=Part	2	advcl	2:advcl:though	_
9	significantly	significantly	ADV	RB	_	8	advmod	8:advmod	SpaceAfter=No
10	.	.	PUNCT	.	_	2	punct	2:punct	_
