SN4 ""

No	Pattern	Freq
1	[pron] is [prep] [det]	1505
2	[pers pn] is [prep] [det]	1260
3	it is [prep] [det]	1189
4	it is [prep] [det]	1189
5	[noun] is [prep] [det]	1137
6	[noun sg] is [prep] [det]	936
7	[adj] is [prep] [det]	145
8	[Wh det] is [prep] [det]	124
9	[det] is [prep] [det]	111
10	[noun prp] is [prep] [det]	100
11	[noun pl] is [prep] [det]	84
12	which is [prep] [det]	78
13	which is [prep] [det]	78
14	[ex0] is [prep] [det]	77
15	there is [prep] [det]	77
16	there is [prep] [det]	77
17	[conj] is [prep] [det]	63
18	this is [prep] [det]	63
19	this is [prep] [det]	63
20	[adv] is [prep] [det]	58
21	[adv] is [prep] [det]	55
22	[verb] is [prep] [det]	47
23	what is [prep] [det]	45
24	what is [prep] [det]	45
25	he is [prep] [det]	41
26	he is [prep] [det]	40
27	[coord] is [prep] [det]	39
28	that is [prep] [det]	37
29	that is [prep] [det]	37
30	and is [prep] [det]	30