SN4 ""

No	Pattern	Freq
1	[verb] how difficult [pron] is	41
2	[vb base] how difficult [pron] is	14
3	know how difficult [pron] is	12
4	[prep] how difficult [pron] is	9
5	know how difficult [pron] is	9
6	[prep] how difficult [pron] is	9
7	[vb infin] how difficult [pron] is	6
8	[adv] how difficult [pron] is	6
9	[adj] how difficult [pron] is	5
10	[vb pp] how difficult [pron] is	5
11	[conj] how difficult [pron] is	5
12	[vb -s] how difficult [pron] is	5
13	and how difficult [pron] is	5
14	[adj] how difficult [pron] is	5
15	and how difficult [pron] is	5
16	[coord] how difficult [pron] is	5
17	how difficult [pron] is [verb]	44
18	how difficult [pron] is [to-vb]	39
19	how difficult [pron] is [prep]	21
20	how difficult [pron] is [prep]	21
21	how difficult [pron] is for	17
22	how difficult [pron] is for	17
23	how difficult [pron] is to get	10
24	how difficult [pron] is get	10
25	how difficult [pron] is [adv]	6
26	how difficult [pron] is [adv]	5
27	how difficult [pron] is [v-ing]	5