SN4 ""

No	Pattern	Freq
1	[noun] is [det] [prep]	1214
2	[noun sg] is [det] [prep]	1013
3	[pron] is [det] [prep]	393
4	[adj] is [det] [prep]	295
5	[det] is [det] [prep]	203
6	there is [det] [prep]	191
7	[ex0] is [det] [prep]	191
8	there is [det] [prep]	191
9	[verb] is [det] [prep]	160
10	[noun pl] is [det] [prep]	129
11	[pers pn] is [det] [prep]	128
12	it is [det] [prep]	111
13	it is [det] [prep]	109
14	that is [det] [prep]	95
15	that is [det] [prep]	95
16	[adv] is [det] [prep]	94
17	this is [det] [prep]	88
18	this is [det] [prep]	88
19	[adv] is [det] [prep]	68
20	[noun prp] is [det] [prep]	64
21	[vb pp] is [det] [prep]	62
22	[Wh det] is [det] [prep]	59
23	[adj] is [det] [prep]	52
24	[conj] is [det] [prep]	47
25	which is [det] [prep]	38
26	which is [det] [prep]	38
27	problem is [det] [prep]	31
28	problem is [det] [prep]	26
29	[num ord] is [det] [prep]	25
30	[to-vb] is [det] [prep]	24