SN4 ""

No	Pattern	Freq
1	[noun] have often been	260
2	[pron] have often been	161
3	[noun sg] have often been	135
4	[pers pn] have often been	118
5	[noun pl] have often been	99
6	it have often been	74
7	it have often been	74
8	[conj] have often been	30
9	[Wh det] have often been	28
10	[noun prp] have often been	23
11	which have often been	20
12	which have often been	20
13	[adj] have often been	19
14	they have often been	15
15	they have often been	15
16	[det] have often been	13
17	[subord] have often been	12
18	[coord] have often been	11
19	as have often been	10
20	and have often been	10
21	i have often been	10
22	and have often been	10
23	as have often been	10
24	i have often been	10
25	this have often been	9
26	he have often been	9
27	he have often been	9
28	this have often been	9
29	what have often been	8
30	what have often been	8