Scholars are not certain when each of the 154 sonnets was composed, but evidence suggests that Shakespeare wrote sonnets throughout his career for a private readership.
1	Scholars	scholar	NOUN	S	Number=Plur	4	nsubj	_	_
2	are	be	AUX	V	Mood=Ind|Number=Plur|Tense=Pres|VerbForm=Fin	4	cop	_	_
3	not	not	PART	PART	Polarity=Neg	4	advmod	_	_
4	certain	certain	ADJ	A	Degree=Pos	0	root	_	_
5	when	when	SCONJ	CS	_	12	mark	_	_
6	each	each	PRON	PI	PronType=Ind	12	nsubj:pass	_	_
7	of	of	ADP	E	_	10	case	_	_
8	the	the	DET	RD	Definite=Def|PronType=Art	10	det	_	_
9	154	154	NUM	N	NumType=Card	10	nummod	_	_
10	sonnets	sonnet	NOUN	S	Number=Plur	6	nmod	_	_
11	was	be	AUX	VA	Mood=Ind|Number=Sing|Person=3|Tense=Past|VerbForm=Fin	12	aux:pass	_	_
12	composed	compose	VERB	V	Tense=Past|VerbForm=Part	4	advcl	_	SpaceAfter=No
13	,	,	PUNCT	FF	_	16	punct	_	_
14	but	but	CCONJ	CC	_	16	cc	_	_
15	evidence	evidence	NOUN	S	Number=Sing	16	nsubj	_	_
16	suggests	suggest	VERB	V	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	conj	_	_
17	that	that	SCONJ	CS	_	19	mark	_	_
18	Shakespeare	Shakespeare	PROPN	SP	_	19	nsubj	_	_
19	wrote	write	VERB	V	Mood=Ind|Person=3|Tense=Past|VerbForm=Fin	16	ccomp	_	_
20	sonnets	sonnet	NOUN	S	Number=Plur	19	obj	_	_
21	throughout	throughout	ADP	E	_	23	case	_	_
22	his	his	DET	AP	Poss=Yes|PronType=Prs	23	nmod:poss	_	_
23	career	career	NOUN	S	Number=Sing	19	obl	_	_
24	for	for	ADP	E	_	27	case	_	_
25	a	a	DET	RI	Definite=Ind|Number=Sing|PronType=Art	27	det	_	_
26	private	private	ADJ	A	Degree=Pos	27	amod	_	_
27	readership	readership	NOUN	S	Number=Sing	19	obl	_	SpaceAfter=No
28	.	.	PUNCT	FS	_	4	punct	_	_
