Offer to do extra chores, ask for your pet as a reward for good grades, something like that.
1	Offer	offer	VERB	VB	Mood=Imp|VerbForm=Fin	0	root	0:root	_
2	to	to	PART	TO	_	3	mark	3:mark	_
3	do	do	VERB	VB	VerbForm=Inf	1	xcomp	1:xcomp	_
4	extra	extra	ADJ	JJ	Degree=Pos	5	amod	5:amod	_
5	chores	chore	NOUN	NNS	Number=Plur	3	obj	3:obj	SpaceAfter=No
6	,	,	PUNCT	,	_	1	punct	1:punct	_
7	ask	ask	VERB	VB	Mood=Imp|VerbForm=Fin	1	list	1:list	_
8	for	for	ADP	IN	_	10	case	10:case	_
9	your	your	PRON	PRP$	Case=Gen|Person=2|Poss=Yes|PronType=Prs	10	nmod:poss	10:nmod:poss	_
10	pet	pet	NOUN	NN	Number=Sing	7	obl	7:obl:for	_
11	as	as	ADP	IN	_	13	case	13:case	_
12	a	a	DET	DT	Definite=Ind|PronType=Art	13	det	13:det	_
13	reward	reward	NOUN	NN	Number=Sing	7	obl	7:obl:as	_
14	for	for	ADP	IN	_	16	case	16:case	_
15	good	good	ADJ	JJ	Degree=Pos	16	amod	16:amod	_
16	grades	grade	NOUN	NNS	Number=Plur	13	nmod	13:nmod:for	SpaceAfter=No
17	,	,	PUNCT	,	_	7	punct	7:punct	_
18	something	something	PRON	NN	Number=Sing|PronType=Ind	1	list	1:list	_
19	like	like	ADP	IN	_	20	case	20:case	_
20	that	that	PRON	DT	Number=Sing|PronType=Dem	18	nmod	18:nmod:like	SpaceAfter=No
21	.	.	PUNCT	.	_	1	punct	1:punct	_
