SN4 ""

No	Pattern	Freq
1	it be [adj] for [pron]	999
2	it be [adj] for [pron]	997
3	it be [adj] for [pers pn]	803
4	it is [adj] for [pron]	405
5	it 's [adj] for [pron]	295
6	it was [adj] for [pron]	261
7	it be [adj] for i	155
8	it be [adj] for me	155
9	it be [adj] for you	153
10	it be [adj] for you	153
11	it be [adj] for we	150
12	it be [adj] for us	150
13	it be [adj] for they	147
14	it be [adj] for them	147
15	it be [adj] for he	118
16	it be [adj] for him	118
17	it be difficult for [pron]	101
18	it be [adj] for [pos pn]	94
19	it be [adj] for [indef pn]	87
20	it be important for [pron]	82
21	it be impossible for [pron]	76
22	it be good for [pron]	76
23	it be possible for [pron]	71
24	it be [adj] for she	63
25	it be [adj] for her	63
26	it be necessary for [pron]	62
27	it be hard for [pron]	49
28	it be easy for [pron]	39
29	it be [adj] for [pron]	29
30	it be bad for [pron]	26