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 [noun] it [be]	5
16	difficult and it [be]	5
17	difficult and it [be]	5
18	difficult it [modal v] [be]	39
19	difficult it [vb mod] [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 [verb] [be]	8
25	difficult it have [be]	8
26	difficult it will [be]	8
27	difficult it will [be]	8
28	difficult it [vb -s] [be]	6
29	difficult it has [be]	5
30	difficult it [be] [verb]	94