SN4 ""

No	Pattern	Freq
1	[pers pn] is [adj] not [to-vb]	215
2	it is [adj] not [verb]	209
3	[pers pn] is [adj] not [verb]	173
4	[pers pn] is important not [verb]	82
5	[pers pn] is important not [verb]	82
6	[pers pn] is good not [verb]	39
7	[pers pn] is difficult not [verb]	28
8	[pers pn] is difficult not [verb]	28
9	[pers pn] is [adj -er] not [verb]	22
10	[pers pn] is best not [verb]	20
11	[pers pn] is [adj -est] not [verb]	20
12	[pers pn] is better not [verb]	19
13	[pers pn] is hard not [verb]	16
14	[pers pn] is hard not [verb]	16
15	[pers pn] is [adj] not see	11
16	[pers pn] is [adj] not to see	11
17	[pers pn] is impossible not [verb]	8
18	[pers pn] is impossible not [verb]	8
19	[pers pn] is [adj] not lose	7
20	[pers pn] is [adj] not to let	7
21	[pers pn] is [adj] not let	7
22	[pers pn] is [adj] not to lose	7
23	[pers pn] is [adj] not to exaggerate	6
24	[pers pn] is [adj] not take	6
25	[pers pn] is advisable not [verb]	6
26	[pers pn] is [adj] not to take	6
27	[pers pn] is essential not [verb]	6
28	[pers pn] is essential not [verb]	6
29	he is [adj] not [verb]	6
30	[pers pn] is advisable not [verb]	6