SN4 ""

No	Pattern	Freq
1	[noun] is often [verb] [prep]	576
2	[noun sg] is often [verb] [prep]	502
3	[pron] is often [verb] [prep]	205
4	[pers pn] is often [verb] [prep]	119
5	it is often [verb] [prep]	102
6	it is often [verb] [prep]	102
7	[Wh det] is often [verb] [prep]	75
8	which is often [verb] [prep]	61
9	which is often [verb] [prep]	61
10	[adj] is often [verb] [prep]	59
11	[conj] is often [verb] [prep]	57
12	[det] is often [verb] [prep]	45
13	this is often [verb] [prep]	43
14	this is often [verb] [prep]	43
15	[noun pl] is often [verb] [prep]	41
16	[coord] is often [verb] [prep]	33
17	and is often [verb] [prep]	31
18	and is often [verb] [prep]	31
19	[noun prp] is often [verb] [prep]	22
20	that is often [verb] [prep]	17
21	that is often [verb] [prep]	17
22	[that] is often [verb] [prep]	17
23	what is often [verb] [prep]	14
24	what is often [verb] [prep]	14
25	[verb] is often [verb] [prep]	14
26	she is often [verb] [prep]	9
27	she is often [verb] [prep]	9
28	he is often [verb] [prep]	7
29	[subord] is often [verb] [prep]	7
30	[num] is often [verb] [prep]	7