the bird must know that when you open the cage door it means that you will put him in the cage, and birds don't usually like cages.
1	the	the	DET	DT	Definite=Def|PronType=Art	2	det	2:det	_
2	bird	bird	NOUN	NN	Number=Sing	4	nsubj	4:nsubj	_
3	must	must	AUX	MD	VerbForm=Fin	4	aux	4:aux	_
4	know	know	VERB	VB	VerbForm=Inf	0	root	0:root	_
5	that	that	SCONJ	IN	_	13	mark	13:mark	_
6	when	when	ADV	WRB	PronType=Int	8	advmod	8:advmod	_
7	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	8	nsubj	8:nsubj	_
8	open	open	VERB	VBP	Mood=Ind|Number=Sing|Person=2|Tense=Pres|VerbForm=Fin	13	advcl	13:advcl	_
9	the	the	DET	DT	Definite=Def|PronType=Art	11	det	11:det	_
10	cage	cage	NOUN	NN	Number=Sing	11	compound	11:compound	_
11	door	door	NOUN	NN	Number=Sing	8	obj	8:obj	_
12	it	it	PRON	PRP	Case=Nom|Gender=Neut|Number=Sing|Person=3|PronType=Prs	13	expl	13:expl	_
13	means	mean	VERB	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	4	ccomp	4:ccomp	_
14	that	that	SCONJ	IN	_	17	mark	17:mark	_
15	you	you	PRON	PRP	Case=Nom|Person=2|PronType=Prs	17	nsubj	17:nsubj	_
16	will	will	AUX	MD	VerbForm=Fin	17	aux	17:aux	_
17	put	put	VERB	VB	VerbForm=Inf	13	ccomp	13:ccomp	_
18	him	he	PRON	PRP	Case=Acc|Gender=Masc|Number=Sing|Person=3|PronType=Prs	17	obj	17:obj	_
19	in	in	ADP	IN	_	21	case	21:case	_
20	the	the	DET	DT	Definite=Def|PronType=Art	21	det	21:det	_
21	cage	cage	NOUN	NN	Number=Sing	17	obl	17:obl:in	SpaceAfter=No
22	,	,	PUNCT	,	_	28	punct	28:punct	_
23	and	and	CCONJ	CC	_	28	cc	28:cc	_
24	birds	bird	NOUN	NNS	Number=Plur	28	nsubj	28:nsubj	_
25-26	don't	_	_	_	_	_	_	_	_
25	do	do	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	28	aux	28:aux	_
26	n't	not	PART	RB	_	28	advmod	28:advmod	_
27	usually	usually	ADV	RB	_	28	advmod	28:advmod	_
28	like	like	VERB	VB	VerbForm=Inf	4	conj	4:conj:and	_
29	cages	cage	NOUN	NNS	Number=Plur	28	obj	28:obj	SpaceAfter=No
30	.	.	PUNCT	.	_	4	punct	4:punct	_
