SN4 ""

No	Pattern	Freq
1	[pron] is for [det]	205
2	[pers pn] is for [det]	192
3	it is for [det]	191
4	it is for [det]	191
5	[noun] is for [det]	100
6	[noun sg] is for [det]	88
7	[adj] is for [det]	15
8	[det] is for [det]	12
9	[adv] is for [det]	9
10	[adv] is for [det]	9
11	there is for [det]	7
12	[ex0] is for [det]	7
13	there is for [det]	7
14	[verb] is for [det]	6
15	[noun prp] is for [det]	6
16	that is for [det]	6
17	this is for [det]	6
18	this is for [det]	6
19	that is for [det]	6
20	[conj] is for [det]	5
21	[Wh det] is for [det]	5
22	is [adj] for [det]	661
23	is [adj] for [det]	627
24	is [verb] for [det]	414
25	is [vb pp] for [det]	333
26	is [adv] for [det]	66
27	is [v-ing] for [det]	64
28	is responsible for [det]	63
29	is responsible for [det]	63
30	is [noun] for [det]	62