SN4 ""

No	Pattern	Freq
1	it is [vb pp] that [det] [noun]	250
2	it is [vb pp] that [det] [noun sg]	142
3	it is [vb pp] that [det] [noun pl]	95
4	it is [vb pp] that [det] [adj]	60
5	it is [vb pp] that [det] be	53
6	it is [vb pp] that [det] [be]	53
7	it is [vb pp] that [det] [vb mod]	49
8	it is [vb pp] that [det] [modal v]	49
9	it is [vb pp] that [det] [prep]	42
10	it is [vb pp] that [det] [prep]	42
11	it is [vb pp] that [det] [adj]	39
12	it is [vb pp] that [det] of	37
13	it is [vb pp] that [det] of	37
14	it is [vb pp] that [det] is	36
15	it is [vb pp] that [det] [is]	36
16	it is [vb pp] that [det] will	28
17	it is [vb pp] that [det] will	28
18	it is [vb pp] that [det] [verb]	21
19	it is [vb pp] that [det] [vb -s]	17
20	it is [vb pp] that [det] [art]	16
21	it is [vb pp] that [det] [num]	16
22	it is [vb pp] that [det] [art]	16
23	it is [vb pp] that [det] [n mass]	11
24	it is [vb pp] that [det] a	10
25	it is [vb pp] that [det] [am/are]	9
26	it is [vb pp] that [det] a	9
27	it is [vb pp] that [det] [was/were]	8
28	it is [vb pp] that [det] are	8
29	it is [vb pp] that [det] the	6
30	it is [vb pp] that [det] people	6