SN4 ""

No	Pattern	Freq
1	[pron] [is] for [det]	246
2	[pers pn] [is] for [det]	229
3	it [is] for [det]	227
4	it [is] for [det]	227
5	[noun] [is] for [det]	105
6	[noun sg] [is] for [det]	93
7	[adj] [is] for [det]	33
8	[det] [is] for [det]	29
9	that [is] for [det]	23
10	that [is] for [det]	23
11	[adv] [is] for [det]	9
12	[adv] [is] for [det]	9
13	[ex0] [is] for [det]	7
14	there [is] for [det]	7
15	there [is] for [det]	7
16	[noun prp] [is] for [det]	6
17	this [is] for [det]	6
18	[verb] [is] for [det]	6
19	this [is] for [det]	6
20	[conj] [is] for [det]	5
21	[Wh det] [is] for [det]	5
22	[is] [adj] for [det]	735
23	[is] [adj] for [det]	693
24	[is] [verb] for [det]	453
25	[is] [vb pp] for [det]	344
26	[is] [adv] for [det]	94
27	[is] [v-ing] for [det]	92
28	[is] [noun] for [det]	82
29	[is] responsible for [det]	71
30	[is] responsible for [det]	71