SN4 ""

No	Pattern	Freq
1	[verb] [to-vb] it is [adv]	25
2	[noun] [to-vb] it is [adv]	20
3	[noun sg] [to-vb] it is [adv]	19
4	[vb base] [to-vb] it is [adv]	11
5	[adv] [to-vb] it is [adv]	8
6	[adj] [to-vb] it is [adv]	8
7	[adj] [to-vb] it is [adv]	7
8	have [to-vb] it is [adv]	6
9	[adv] [to-vb] it is [adv]	5
10	[vb pp] [to-vb] it is [adv]	5
11	way [to-vb] it is [adv]	5
12	way [to-vb] it is [adv]	5
13	[to-vb] [conj] it is [adv]	217
14	[to-vb] that it is [adv]	152
15	[to-vb] that it is [adv]	152
16	[to-vb] [that] it is [adv]	152
17	[to-vb] [subord] it is [adv]	50
18	[to-vb] [coord] it is [adv]	15
19	[to-vb] [pron] it is [adv]	13
20	[to-vb] if it is [adv]	11
21	[to-vb] [prep] it is [adv]	11
22	[to-vb] because it is [adv]	11
23	[to-vb] because it is [adv]	11
24	[to-vb] [prep] it is [adv]	11
25	[to-vb] if it is [adv]	11
26	[to-vb] whether it is [adv]	10
27	[to-vb] whether it is [adv]	10
28	[to-vb] [noun] it is [adv]	9
29	[to-vb] [adj] it is [adv]	8
30	[to-vb] and it is [adv]	8