SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] [vb pp] for	27
2	[coord] it is [adv] [vb pp] for	11
3	[subord] it is [adv] [vb pp] for	9
4	that it is [adv] [vb pp] for	7
5	that it is [adv] [vb pp] for	7
6	[that] it is [adv] [vb pp] for	7
7	but it is [adv] [vb pp] for	6
8	but it is [adv] [vb pp] for	6
9	and it is [adv] [vb pp] for	5
10	and it is [adv] [vb pp] for	5
11	it is [adv] [adv] [vb pp] for	25
12	it is [adv] [adv] [vb pp] for	17
13	it is not [adv] [vb pp] for	8
14	it is [not/n't] [adv] [vb pp] for	8
15	it is not [adv] [vb pp] for	7
16	it is [adv] [adv] [vb pp] for	19
17	it is [adv] [adv] [vb pp] for	17
18	it is [adv] [vb pp] for [noun]	28
19	it is [adv] [vb pp] for [art]	19
20	it is [adv] [vb pp] for [art]	19
21	it is [adv] [vb pp] for [noun sg]	17
22	it is [adv] [vb pp] for [verb]	17
23	it is [adv] [vb pp] for the	16
24	it is [adv] [vb pp] for the	16
25	it is [adv] [vb pp] for [adj]	15
26	it is [adv] [vb pp] for [adj]	10
27	it is [adv] [vb pp] for [v-ing]	10
28	it is [adv] [vb pp] for [noun pl]	9
29	it is [adv] [vb pp] for [pron]	8
30	it is [adv] [vb pp] for [vb pp]	7