SN4 ""

No	Pattern	Freq
1	[noun] [coord] it is to be	9
2	[coord] [adv] it is to be	14
3	[coord] [conj] it is to be	12
4	[coord] [subord] it is to be	11
5	[coord] how it is to be	11
6	[coord] how it is to be	11
7	[coord] [Wh adv] it is to be	11
8	[coord] if it is to be	5
9	[coord] if it is to be	5
10	[coord] it is [adj] to be	74
11	[coord] it is [adj] to be	73
12	[coord] it is [verb] to be	39
13	[coord] it is [vb pp] to be	32
14	[coord] it is important to be	16
15	[coord] it is important to be	16
16	[coord] it is [adv] to be	14
17	[coord] it is likely to be	13
18	[coord] it is likely to be	13
19	[coord] it is believed to be	12
20	[coord] it is believe to be	12
21	[coord] it is difficult to be	8
22	[coord] it is [not/n't] to be	8
23	[coord] it is not to be	8
24	[coord] it is difficult to be	8
25	[coord] it is unlikely to be	7
26	[coord] it is not to be	7
27	[coord] it is unlikely to be	7
28	[coord] it is [v-ing] to be	7
29	[coord] it is [adv] to be	6
30	[coord] it is thought to be	6