SN4 ""

No	Pattern	Freq
1	it is [adv] [adj] [to-vb] that	541
2	it be [adv] [adj] [to-vb] that	523
3	it be [adv] [adj] to say that	158
4	it be [not/n't] [adj] [to-vb] that	146
5	it be not [adj] [to-vb] that	146
6	it be not [adj] [to-vb] that	141
7	it be also [adj] [to-vb] that	108
8	it be also [adj] [to-vb] that	108
9	it be [adv] important [to-vb] that	79
10	it be [adv] true [to-vb] that	72
11	it was [adv] [adj] [to-vb] that	67
12	it 's [adv] [adj] [to-vb] that	59
13	it be probably [adj] [to-vb] that	52
14	it be probably [adj] [to-vb] that	52
15	it be [adv] fair [to-vb] that	45
16	it be [adv] [adj] to note that	43
17	it be [adv] possible [to-vb] that	39
18	it be [adv] difficult [to-vb] that	39
19	it be very [adj] [to-vb] that	36
20	it be very [adj] [to-vb] that	36
21	it be [adv] [adj] to find that	34
22	it be [adv] [adj] to assume that	32
23	it be [adv] surprising [to-vb] that	29
24	it be therefore [adj] [to-vb] that	26
25	it be therefore [adj] [to-vb] that	26
26	it be [adv] [adj] to suggest that	26
27	it be [adv] [adj] to ensure that	26
28	it be [adv] [adj] to see that	26
29	it be [adv] [adj] to remember that	25
30	it be perhaps [adj] [to-vb] that	25