SN4 ""

No	Pattern	Freq
1	[verb] it [adv] difficult	637
2	find it [adv] difficult	328
3	make it [adv] difficult	308
4	[vb base] it [adv] difficult	141
5	[vb infin] it [adv] difficult	130
6	[vb past] it [adv] difficult	110
7	find it [adv] difficult	97
8	[v-ing] it [adv] difficult	94
9	[vb -s] it [adv] difficult	91
10	makes it [adv] difficult	76
11	find it [adv] difficult	76
12	found it [adv] difficult	64
13	make it [adv] difficult	53
14	making it [adv] difficult	48
15	finding it [adv] difficult	46
16	made it [adv] difficult	46
17	[vb pp] it [adv] difficult	45
18	make it [adv] difficult	44
19	[to-vb] it [adv] difficult	26
20	found it [adv] difficult	24
21	made it [adv] difficult	21
22	to make it [adv] difficult	20
23	finds it [adv] difficult	15
24	[be] it [adv] difficult	11
25	be it [adv] difficult	11
26	is it [adv] difficult	7
27	[is] it [adv] difficult	7
28	to find it [adv] difficult	6
29	it be [adv] difficult	1332
30	it [be] [adv] difficult	1332