SN4 ""

No	Pattern	Freq
1	[noun] but it is [prep]	23
2	[noun sg] but it is [prep]	17
3	[adj] but it is [prep]	8
4	[adj] but it is [prep]	6
5	but [conj] it is [prep]	15
6	but [subord] it is [prep]	9
7	but that it is [prep]	5
8	but if it is [prep]	5
9	but if it is [prep]	5
10	but [that] it is [prep]	5
11	but that it is [prep]	5
12	but it is [adj] [prep]	239
13	but it is [adj] [prep]	210
14	but it is [adv] [prep]	183
15	but it is [verb] [prep]	113
16	but it is [adv] [prep]	105
17	but it is [vb pp] [prep]	99
18	but it is [not/n't] [prep]	63
19	but it is not [prep]	63
20	but it is not [prep]	51
21	but it is [prep] [prep]	32
22	but it is [prep] [prep]	32
23	but it is by [prep]	27
24	but it is by [prep]	27
25	but it is only [prep]	25
26	but it is only [prep]	25
27	but it is important [prep]	24
28	but it is important [prep]	24
29	but it is [noun] [prep]	17
30	but it is one [prep]	17