SN4 ""

No	Pattern	Freq
1	it be [adj] for [pers pn] [to-vb]	479
2	it be [adj] for [pers pn] [to-vb]	478
3	it is [adj] for [pers pn] [to-vb]	217
4	it was [adj] for [pers pn] [to-vb]	143
5	it be [adj] for us [to-vb]	107
6	it be [adj] for me [to-vb]	96
7	it 's [adj] for [pers pn] [to-vb]	95
8	it be [adj] for them [to-vb]	90
9	it be [adj] for him [to-vb]	81
10	it be difficult for [pers pn] [to-vb]	68
11	it be [adj] for you [to-vb]	63
12	it be important for [pers pn] [to-vb]	53
13	it be impossible for [pers pn] [to-vb]	47
14	it be necessary for [pers pn] [to-vb]	44
15	it be possible for [pers pn] [to-vb]	43
16	it be [adj] for her [to-vb]	36
17	it be hard for [pers pn] [to-vb]	31
18	it be [adj] for [pers pn] to have	22
19	it be easy for [pers pn] [to-vb]	21
20	it be [adj] for [pers pn] to do	20
21	it be [adj] for [pers pn] [to-vb]	18
22	it be [adj] for [pers pn] to know	14
23	it be [adj] for [pers pn] to get	14
24	it be [adj] for [pers pn] to go	14
25	it be [adj] for [pers pn] to see	13
26	it be [adj] for [pers pn] to give	11
27	it be good for [pers pn] [to-vb]	10
28	it be safe for [pers pn] [to-vb]	10
29	it be [adj] for [pers pn] to come	10
30	it be [adj] for [pers pn] to understand	10