SN4 ""

No	Pattern	Freq
1	[adv] difficult it be	147
2	[Wh adv] difficult it be	117
3	how difficult it be	115
4	how difficult it be	115
5	[adv] difficult it be	29
6	more difficult it be	23
7	more difficult it be	23
8	difficult [conj] it be	37
9	difficult [subord] it be	30
10	difficult because it be	10
11	difficult because it be	10
12	difficult as it be	9
13	difficult as it be	9
14	difficult [coord] it be	6
15	difficult and it be	5
16	difficult [noun] it be	5
17	difficult and it be	5
18	difficult it [vb mod] be	39
19	difficult it [modal v] be	39
20	difficult it would be	12
21	difficult it would be	12
22	difficult it can be	9
23	difficult it can be	9
24	difficult it will be	8
25	difficult it [verb] be	8
26	difficult it will be	8
27	difficult it have be	8
28	difficult it [vb -s] be	6
29	difficult it has be	5
30	difficult it be [verb]	94