SN4 ""

No	Pattern	Freq
1	[verb] how difficult it be [prep]	22
2	[vb base] how difficult it be [prep]	8
3	know how difficult it be [prep]	6
4	know how difficult it be [prep]	6
5	[vb past] how difficult it be [prep]	5
6	how difficult it [modal v] be [prep]	5
7	how difficult it [vb mod] be [prep]	5
8	how difficult it be [verb] [prep]	11
9	how difficult it be [to-vb] [prep]	6
10	how difficult it be going [prep]	5
11	how difficult it be [v-ing] [prep]	5
12	how difficult it be go [prep]	5
13	how difficult it be [prep] [noun]	12
14	how difficult it be [prep] [pers pn]	7
15	how difficult it be [prep] [pron]	7
16	how difficult it be [prep] [noun pl]	7