SN4 ""

No	Pattern	Freq
1	it [was/were] [verb] [prep] the	1822
2	it was [verb] [prep] the	1786
3	it [was/were] [vb pp] [prep] the	1642
4	it [was/were] [verb] by the	484
5	it [was/were] [verb] in the	359
6	it [was/were] [verb] to the	191
7	it [was/were] [v-ing] [prep] the	142
8	it [was/were] [verb] at the	130
9	it [was/were] [verb] on the	115
10	it [was/were] [verb] from the	84
11	it [was/were] [verb] with the	78
12	it [was/were] [verb] as the	63
13	it [was/were] [verb] for the	61
14	it [was/were] [verb] into the	48
15	it [was/were] built [prep] the	47
16	it [was/were] build [prep] the	47
17	it [was/were] hold [prep] the	42
18	it [was/were] held [prep] the	41
19	it [was/were] [to-vb] [prep] the	37
20	it [was/were] leave [prep] the	37
21	it [was/were] left [prep] the	37
22	it were [verb] [prep] the	36
23	it [was/were] report [prep] the	31
24	it [was/were] reported [prep] the	31
25	it [was/were] know [prep] the	27
26	it [was/were] known [prep] the	27
27	it [was/were] used [prep] the	26
28	it [was/were] use [prep] the	26
29	it [was/were] made [prep] the	25
30	it [was/were] make [prep] the	25