SN4 ""

No	Pattern	Freq
1	[conj] it is difficult say	6
2	[noun] it is difficult say	5
3	it is [adv] difficult say	17
4	it is [adv] difficult say	14
5	it is very difficult say	5
6	it is very difficult say	5
7	it is difficult say [adv]	17
8	it is difficult say [conj]	15
9	it is difficult say [Wh adv]	11
10	it is difficult say [subord]	10
11	it is difficult say how	8
12	it is difficult say how	8
13	it is difficult say whether	7
14	it is difficult say [Wh det]	7
15	it is difficult say whether	7
16	it is difficult say [pron]	7
17	it is difficult say [adv]	6
18	it is difficult say what	5
19	it is difficult say what	5