SN4 ""

No	Pattern	Freq
1	[noun] but it is [vb pp]	45
2	[noun sg] but it is [vb pp]	29
3	[adj] but it is [vb pp]	11
4	[noun pl] but it is [vb pp]	10
5	[adj] but it is [vb pp]	9
6	[adv] but it is [vb pp]	8
7	[verb] but it is [vb pp]	7
8	[noun prp] but it is [vb pp]	6
9	[adv] but it is [vb pp]	5
10	[vb pp] but it is [vb pp]	5
11	but [conj] it is [vb pp]	57
12	but [subord] it is [vb pp]	50
13	but [adv] it is [vb pp]	31
14	but [adv] it is [vb pp]	25
15	but if it is [vb pp]	19
16	but if it is [vb pp]	19
17	but when it is [vb pp]	16
18	but when it is [vb pp]	16
19	but [that] it is [vb pp]	7
20	but now it is [vb pp]	7
21	but now it is [vb pp]	7
22	but that it is [vb pp]	7
23	but that it is [vb pp]	7
24	but [Wh adv] it is [vb pp]	6
25	but how it is [vb pp]	5
26	but how it is [vb pp]	5
27	but it is [adv] [vb pp]	208
28	but it is [adv] [vb pp]	163
29	but it is not [vb pp]	45
30	but it is [not/n't] [vb pp]	45