It was not until he had his hand on the doorknob that he began to suspect what he was doing.
1	It	it	PRON	EX-P3SG	_	2	expl	_	_
2	was	be	VERB	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	0	root	_	_
3	not	not	PART	NEG	_	2	advmod	_	_
4	until	until	SCONJ	_	_	6	mark	_	_
5	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	6	nsubj	_	_
6	had	have	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	2	advcl	_	_
7	his	he	PRON	P3SG-GEN	Gender=Masc|Number=Sing|Person=3|Poss=Yes|PronType=Prs	8	nmod:poss	_	_
8	hand	hand	NOUN	SG-NOM	Number=Sing	6	obj	_	_
9	on	on	ADP	_	_	11	case	_	_
10	the	the	DET	DEF	Definite=Def|PronType=Art	11	det	_	_
11	doorknob	doorknob	NOUN	SG-NOM	Number=Sing	6	obl	_	_
12	that	that	SCONJ	_	_	14	mark	_	_
13	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	14	nsubj	_	_
14	began	begin	VERB	PAST	Mood=Ind|Tense=Past|VerbForm=Fin	2	dislocated	_	_
15	to	to	PART	_	_	16	mark	_	_
16	suspect	suspect	VERB	INF	VerbForm=Inf	14	xcomp	_	_
17	what	what	PRON	WH	PronType=Int	20	obj	_	_
18	he	he	PRON	PERS-P3SG-NOM	Case=Nom|Gender=Masc|Number=Sing|Person=3|PronType=Prs	20	nsubj	_	_
19	was	be	AUX	PAST	Mood=Ind|Number=Sing|Person=1|Tense=Past|VerbForm=Fin	20	aux	_	_
20	doing	do	VERB	ING	Tense=Pres|VerbForm=Part	16	xcomp	_	SpaceAfter=No
21	.	.	PUNCT	Period	_	2	punct	_	_
