SN4 ""

No	Pattern	Freq
1	[adj] [noun pl] it be difficult	28
2	[adj] [noun pl] it be difficult	18
3	[noun sg] [noun pl] it be difficult	7
4	[det] [noun pl] it be difficult	7
5	[noun] [noun pl] it be difficult	7
6	[prep] [noun pl] it be difficult	5
7	[prep] [noun pl] it be difficult	5
8	[noun pl] [conj] it be difficult	47
9	[noun pl] [coord] it be difficult	27
10	[noun pl] and it be difficult	22
11	[noun pl] and it be difficult	22
12	[noun pl] that it be difficult	10
13	[noun pl] that it be difficult	10
14	[noun pl] [subord] it be difficult	10
15	[noun pl] [that] it be difficult	10
16	[noun pl] [adv] it be difficult	9
17	[noun pl] [Wh adv] it be difficult	8
18	[noun pl] but it be difficult	5
19	[noun pl] but it be difficult	5
20	[noun pl] it [vb mod] be difficult	19
21	[noun pl] it [modal v] be difficult	19
22	[noun pl] it may be difficult	8
23	[noun pl] it may be difficult	8
24	[noun pl] it be [adv] difficult	25
25	[noun pl] it be [adv] difficult	20
26	[noun pl] it be very difficult	8
27	[noun pl] it be very difficult	8
28	[noun pl] it be not difficult	5
29	[noun pl] it be [not/n't] difficult	5
30	[noun pl] it be not difficult	5