SN4 ""

No	Pattern	Freq
1	[conj] it is difficult see	58
2	[coord] it is difficult see	31
3	and it is difficult see	20
4	and it is difficult see	20
5	[subord] it is difficult see	16
6	[that] it is difficult see	11
7	but it is difficult see	11
8	that it is difficult see	11
9	that it is difficult see	11
10	but it is difficult see	11
11	[noun] it is difficult see	9
12	[noun sg] it is difficult see	6
13	[adv] it is difficult see	5
14	[adj] it is difficult see	5
15	it is [adv] difficult see	56
16	it is not difficult see	37
17	it is [not/n't] difficult see	37
18	it is not difficult see	36
19	it is [adv] difficult see	19
20	it is very difficult see	10
21	it is very difficult see	10
22	it is difficult [adv] see	10
23	it is difficult not see	8
24	it is difficult [not/n't] see	8
25	it is difficult not see	8
26	it is difficult see [adv]	118
27	it is difficult see [Wh adv]	114
28	it is difficult see how	98
29	it is difficult see how	98
30	it is difficult see [pron]	30