SN4 ""

No	Pattern	Freq
1	[noun] [is] often [verb]	956
2	[noun sg] [is] often [verb]	819
3	[pron] [is] often [verb]	583
4	[pers pn] [is] often [verb]	419
5	it [is] often [verb]	386
6	it [is] often [verb]	386
7	[conj] [is] often [verb]	150
8	[Wh det] [is] often [verb]	144
9	[adj] [is] often [verb]	100
10	which [is] often [verb]	95
11	which [is] often [verb]	95
12	[det] [is] often [verb]	75
13	[noun pl] [is] often [verb]	71
14	this [is] often [verb]	68
15	this [is] often [verb]	68
16	[coord] [is] often [verb]	55
17	[subord] [is] often [verb]	50
18	what [is] often [verb]	49
19	what [is] often [verb]	49
20	[noun prp] [is] often [verb]	47
21	and [is] often [verb]	46
22	and [is] often [verb]	46
23	that [is] often [verb]	45
24	[that] [is] often [verb]	45
25	that [is] often [verb]	45
26	as [is] often [verb]	28
27	as [is] often [verb]	28
28	[verb] [is] often [verb]	27
29	than [is] often [verb]	21
30	than [is] often [verb]	21