SN4 ""

No	Pattern	Freq
1	it is difficult for [pron]	57
2	it is difficult for [pers pn]	49
3	it is difficult for [art]	31
4	it is difficult for [art]	31
5	it is difficult for [noun]	28
6	it is difficult for [adj]	21
7	it is difficult for [noun pl]	20
8	it is difficult for the	19
9	it is difficult for the	19
10	it is difficult for we	16
11	it is difficult for us	16
12	it is difficult for them	13
13	it is difficult for they	13
14	it is difficult for [det]	12
15	it is difficult for a	12
16	it is difficult for [adj]	9
17	it is difficult for a	9
18	it is difficult for me	8
19	it is difficult for i	8
20	it is difficult for [indef pn]	7
21	it is difficult for anyone	6
22	it is difficult for anyone	6
23	it is difficult for him	5
24	it is difficult for he	5
25	[conj] it is difficult for	44
26	[that] it is difficult for	16
27	that it is difficult for	16
28	that it is difficult for	16
29	[coord] it is difficult for	15
30	[subord] it is difficult for	13