SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] for [pron]	16
2	[coord] it is [adv] for [pron]	7
3	that it is [adv] for [pron]	6
4	that it is [adv] for [pron]	6
5	[that] it is [adv] for [pron]	6
6	it is [adv] [adv] for [pron]	15
7	it is [adj] [adv] for [pron]	12
8	it is [adj] [adv] for [pron]	11
9	it is [adv] [adv] for [pron]	10
10	it is [not/n't] [adv] for [pron]	5
11	it is not [adv] for [pron]	5
12	it is [adv] [adj] for [pron]	235
13	it is [adv] [adj] for [pron]	223
14	it is [adv] important for [pron]	23
15	it is [adv] important for [pron]	23
16	it is [adv] possible for [pron]	20
17	it is [adv] possible for [pron]	20
18	it is [adv] easy for [pron]	19
19	it is [adv] difficult for [pron]	17
20	it is [adv] difficult for [pron]	17
21	it is [adv] [adv] for [pron]	15
22	it is [adv] easy for [pron]	15
23	it is [adv] necessary for [pron]	14
24	it is [adv] necessary for [pron]	14
25	it is [adv] [verb] for [pron]	13
26	it is [adv] [adv] for [pron]	12
27	it is [adv] [vb pp] for [pron]	10
28	it is [adv] [adj -er] for [pron]	9
29	it is [adv] impossible for [pron]	8
30	it is [adv] impossible for [pron]	8