SN4 ""

No	Pattern	Freq
1	[conj] [pers pn] is not [to-vb]	24
2	[subord] [pers pn] is not [to-vb]	17
3	if [pers pn] is not [to-vb]	13
4	if [pers pn] is not [to-vb]	13
5	[adj] [pers pn] is not [to-vb]	7
6	[adj] [pers pn] is not [to-vb]	7
7	[pers pn] is [adj] not [to-vb]	215
8	[pers pn] is [adj] not [to-vb]	173
9	[pers pn] is important not [to-vb]	82
10	[pers pn] is important not [to-vb]	82
11	[pers pn] is good not [to-vb]	39
12	[pers pn] is difficult not [to-vb]	28
13	[pers pn] is difficult not [to-vb]	28
14	[pers pn] is [adj -er] not [to-vb]	22
15	[pers pn] is [adj -est] not [to-vb]	20
16	[pers pn] is best not [to-vb]	20
17	[pers pn] is better not [to-vb]	19
18	[pers pn] is hard not [to-vb]	16
19	[pers pn] is hard not [to-vb]	16
20	[pers pn] is [verb] not [to-vb]	13
21	[pers pn] is [vb pp] not [to-vb]	12
22	[pers pn] is impossible not [to-vb]	8
23	[pers pn] is impossible not [to-vb]	8
24	[pers pn] is essential not [to-vb]	6
25	[pers pn] is advisable not [to-vb]	6
26	[pers pn] is essential not [to-vb]	6
27	[pers pn] is advisable not [to-vb]	6
28	[pers pn] is not [adj] [to-vb]	1415
29	[pers pn] is not [adj] [to-vb]	1411
30	[pers pn] is not possible [to-vb]	392