SN4 ""

No	Pattern	Freq
1	be [adv] difficult [verb] and	65
2	[be] [adv] difficult [verb] and	65
3	are [adv] difficult [verb] and	24
4	[am/are] [adv] difficult [verb] and	24
5	[is] [adv] difficult [verb] and	23
6	is [adv] difficult [verb] and	22
7	[adv] [adv] difficult [verb] and	17
8	[adv] [adv] difficult [verb] and	16
9	[be] [adv] difficult [verb] and	9
10	be [adv] difficult [verb] and	9
11	[pers pn] [adv] difficult [verb] and	8
12	[was/were] [adv] difficult [verb] and	8
13	[pron] [adv] difficult [verb] and	8
14	it [adv] difficult [verb] and	8
15	it [adv] difficult [verb] and	8
16	was [adv] difficult [verb] and	7
17	much [adv] difficult [verb] and	6
18	much [adv] difficult [verb] and	6
19	the [adv] difficult [verb] and	5
20	[art] [adv] difficult [verb] and	5
21	the [adv] difficult [verb] and	5
22	[noun] [adv] difficult [verb] and	5
23	[art] [adv] difficult [verb] and	5
24	[adv] [adv] difficult [verb] and	16
25	[adv] [adv] difficult [verb] and	16
26	[adv] more difficult [verb] and	12
27	[adv] more difficult [verb] and	12
28	[adv] difficult [noun sg] [verb] and	5
29	[adv] difficult [noun] [verb] and	5
30	[adv] difficult [verb] [noun] and	13