SN4 ""

No	Pattern	Freq
1	[conj] it was not [to-vb]	9
2	[subord] it was not [to-vb]	6
3	[pron] it was not [to-vb]	5
4	it was [adj] not [to-vb]	82
5	it was [adj] not [to-vb]	61
6	it was impossible not [to-vb]	22
7	it was impossible not [to-vb]	22
8	it was good not [to-vb]	17
9	it was [adj -er] not [to-vb]	15
10	it was [vb pp] not [to-vb]	14
11	it was [verb] not [to-vb]	14
12	it was hard not [to-vb]	11
13	it was hard not [to-vb]	11
14	it was better not [to-vb]	11
15	it was important not [to-vb]	10
16	it was decide not [to-vb]	10
17	it was decided not [to-vb]	10
18	it was important not [to-vb]	10
19	it was best not [to-vb]	6
20	it was [adj -est] not [to-vb]	6
21	it was difficult not [to-vb]	6
22	it was difficult not [to-vb]	6
23	it was not [adj] [to-vb]	392
24	it was not [adj] [to-vb]	387
25	it was not possible [to-vb]	114
26	it was not possible [to-vb]	114
27	it was not [verb] [to-vb]	71
28	it was not easy [to-vb]	59
29	it was not easy [to-vb]	58
30	it was not [adv] [to-vb]	44