SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] to [be]	13
2	[coord] it is [adv] to [be]	6
3	[subord] it is [adv] to [be]	6
4	it is [adv] [adv] to [be]	11
5	it is [adj] [adv] to [be]	11
6	it is [adj] [adv] to [be]	11
7	it is [adv] [adv] to [be]	7
8	it is [adv] [adj] to [be]	188
9	it is [adv] [adj] to [be]	181
10	it is [adv] likely to [be]	63
11	it is [adv] likely to [be]	63
12	it is [adv] [verb] to [be]	56
13	it is [adv] [vb pp] to [be]	40
14	it is [adv] important to [be]	17
15	it is [adv] important to [be]	17
16	it is [adv] [v-ing] to [be]	16
17	it is [adv] going to [be]	14
18	it is [adv] go to [be]	14
19	it is [adv] [adv] to [be]	10
20	it is [adv] difficult to [be]	10
21	it is [adv] difficult to [be]	10
22	it is [adv] consider to [be]	8
23	it is [adv] considered to [be]	8
24	it is [adv] [adv] to [be]	7
25	it is [adv] easy to [be]	6
26	it is [adv] useful to [be]	6
27	it is [adv] possible to [be]	6
28	it is [adv] good to [be]	6
29	it is [adv] easy to [be]	6
30	it is [adv] possible to [be]	6