SN4 ""

No	Pattern	Freq
1	it is [adj] [adv] have	19
2	it is [adj] [adv] have	18
3	it is [adv] [adv] have	12
4	it is not [adv] have	10
5	it is [not/n't] [adv] have	10
6	it is not [adv] have	8
7	it is bad [adv] have	5
8	it is bad [adv] have	5
9	it is [adv] [adj] have	190
10	it is [adv] [adj] have	177
11	it is [adv] [verb] have	24
12	it is [adv] [vb pp] have	19
13	it is [adv] possible have	17
14	it is [adv] possible have	17
15	it is [adv] necessary have	16
16	it is [adv] necessary have	16
17	it is [adv] important have	15
18	it is [adv] important have	15
19	it is [adv] good have	15
20	it is [adv] [adv] have	12
21	it is [adv] [adv] have	12
22	it is [adv] [adj -er] have	11
23	it is [adv] [pron] have	11
24	it is [adv] [pers pn] have	11
25	it is [adv] better have	11
26	it is [adv] enough have	9
27	it is [adv] useful have	9
28	it is [adv] useful have	9
29	it is [adv] enough have	9
30	it is [adv] [prep] have	8