SN4 ""

No	Pattern	Freq
1	[conj] it is [adv] [adv] for	6
2	it is [adv] [adv] [adv] for	9
3	it is [adv] [adv] [adv] for	6
4	it is [adv] [adj] [adv] for	16
5	it is [adv] [adj] [adv] for	16
6	it is [adv] [adv] [adv] for	7
7	it is [adv] [adv] [adv] for	6
8	it is [adv] [adv] [adj] for	160
9	it is [adv] [adv] [adj] for	157
10	it is [adv] [adv] easy for	31
11	it is [adv] [adv] easy for	28
12	it is [adv] [adv] [verb] for	20
13	it is [adv] [adv] [vb pp] for	17
14	it is [adv] [adv] difficult for	12
15	it is [adv] [adv] difficult for	12
16	it is [adv] [adv] possible for	11
17	it is [adv] [adv] possible for	11
18	it is [adv] [adv] common for	9
19	it is [adv] [adv] common for	9
20	it is [adv] [adv] important for	7
21	it is [adv] [adv] suitable for	7
22	it is [adv] [adv] important for	7
23	it is [adv] [adv] suitable for	7
24	it is [adv] [adv] [adv] for	6
25	it is [adv] [adv] [adv] for	6
26	it is [adv] [adv] necessary for	5
27	it is [adv] [adv] necessary for	5
28	it is [adv] [adv] for [art]	7
29	it is [adv] [adv] for [art]	7
30	it is [adv] [adv] for [pron]	7