SN4 ""

No	Pattern	Freq
1	but [pers pn] is not [adj]	316
2	but it is not [adj]	299
3	but [pers pn] is not [adj]	277
4	but [pers pn] is n't [adj]	55
5	but [pers pn] is not clear	51
6	but [pers pn] is not clear	51
7	but [pers pn] is not easy	27
8	but [pers pn] is not easy	26
9	but he is not [adj]	23
10	but [pers pn] is not true	14
11	but [pers pn] is not true	14
12	but [pers pn] is not [det]	13
13	but [pers pn] is not possible	11
14	but [pers pn] is not possible	11
15	but she is not [adj]	10
16	but [pers pn] is not necessary	10
17	but [pers pn] is not necessary	10
18	but [pers pn] is not good	9
19	but [pers pn] is not good	9
20	but [pers pn] is not likely	8
21	but [pers pn] is not impossible	8
22	but [pers pn] is not likely	8
23	but [pers pn] is not impossible	8
24	but [pers pn] is not all	7
25	but [pers pn] is not certain	7
26	but [pers pn] is not all	7
27	but [pers pn] is not certain	7
28	but [pers pn] is not difficult	7
29	but [pers pn] is not difficult	7
30	but [pers pn] is not fair	6