SN4 ""

No	Pattern	Freq
1	[conj] [pers pn] had difficulty	44
2	that [pers pn] had difficulty	15
3	that [pers pn] had difficulty	15
4	[that] [pers pn] had difficulty	15
5	[subord] [pers pn] had difficulty	15
6	[coord] [pers pn] had difficulty	14
7	and [pers pn] had difficulty	11
8	and [pers pn] had difficulty	11
9	[noun] [pers pn] had difficulty	7
10	[noun sg] [pers pn] had difficulty	6
11	[adv] [pers pn] had difficulty	6
12	[adv] [pers pn] had difficulty	5
13	[pers pn] [adv] had difficulty	11
14	[pers pn] [adv] had difficulty	11
15	[pers pn] had [adj] difficulty	60
16	[pers pn] had [adj] difficulty	36
17	[pers pn] had [art] difficulty	34
18	[pers pn] had [art] difficulty	34
19	[pers pn] had no difficulty	30
20	[pers pn] had no difficulty	30
21	[pers pn] had great difficulty	25
22	[pers pn] had great difficulty	25
23	[pers pn] had [det] difficulty	24
24	[pers pn] had some difficulty	8
25	[pers pn] had some difficulty	8
26	[pers pn] had little difficulty	7
27	[pers pn] had little difficulty	7
28	[pers pn] had [vb pp] difficulty	6
29	[pers pn] had [verb] difficulty	6
30	[pers pn] had difficulty [prep]	51