SN4 ""

No	Pattern	Freq
1	[be] difficult to be	73
2	be difficult to be	73
3	[is] difficult to be	56
4	is difficult to be	42
5	[adv] difficult to be	40
6	[adv] difficult to be	38
7	's difficult to be	14
8	[was/were] difficult to be	12
9	was difficult to be	12
10	[pron] difficult to be	11
11	[pers pn] difficult to be	11
12	it difficult to be	11
13	it difficult to be	11
14	very difficult to be	10
15	very difficult to be	10
16	more difficult to be	6
17	more difficult to be	6
18	[be] difficult to be	5
19	be difficult to be	5
20	difficult [noun] to be	14
21	difficult [adv] to be	9
22	difficult not to be	8
23	difficult [not/n't] to be	8
24	difficult [noun pl] to be	8
25	difficult not to be	8
26	difficult decision to be	6
27	difficult [noun sg] to be	6
28	difficult decisions to be	5
29	difficult to be [adj]	88
30	difficult to be [adj]	88