SN4 ""

No	Pattern	Freq
1	[noun] [conj] it be difficult [prep]	21
2	[verb] [conj] it be difficult [prep]	14
3	[adj] [conj] it be difficult [prep]	11
4	[adj] [conj] it be difficult [prep]	9
5	[noun sg] [conj] it be difficult [prep]	9
6	[noun pl] [conj] it be difficult [prep]	8
7	[adv] [conj] it be difficult [prep]	6
8	is [conj] it be difficult [prep]	5
9	[is] [conj] it be difficult [prep]	5
10	[adv] [conj] it be difficult [prep]	5
11	be [conj] it be difficult [prep]	5
12	[be] [conj] it be difficult [prep]	5
13	[conj] it [modal v] be difficult [prep]	27
14	[conj] it [vb mod] be difficult [prep]	27
15	[conj] it would be difficult [prep]	10
16	[conj] it would be difficult [prep]	10
17	[conj] it will be difficult [prep]	7
18	[conj] it will be difficult [prep]	7
19	[conj] it may be difficult [prep]	6
20	[conj] it may be difficult [prep]	6
21	[conj] it be [adv] difficult [prep]	62
22	[conj] it be [adv] difficult [prep]	61
23	[conj] it be very difficult [prep]	25
24	[conj] it be very difficult [prep]	25
25	[conj] it be more difficult [prep]	7
26	[conj] it be more difficult [prep]	7
27	[conj] it be often difficult [prep]	5
28	[conj] it be often difficult [prep]	5
29	[conj] it be difficult [verb] [prep]	57
30	[conj] it be difficult [to-vb] [prep]	57