SN4 ""

No	Pattern	Freq
1	[be] [adv] hard [to-vb]	465
2	be [adv] hard [to-vb]	465
3	[verb] [adv] hard [to-vb]	271
4	[is] [adv] hard [to-vb]	264
5	is [adv] hard [to-vb]	149
6	's [adv] hard [to-vb]	115
7	try [adv] hard [to-vb]	102
8	work [adv] hard [to-vb]	95
9	[pron] [adv] hard [to-vb]	85
10	[pers pn] [adv] hard [to-vb]	82
11	[was/were] [adv] hard [to-vb]	80
12	[adv] [adv] hard [to-vb]	79
13	it [adv] hard [to-vb]	78
14	it [adv] hard [to-vb]	78
15	was [adv] hard [to-vb]	69
16	[vb past] [adv] hard [to-vb]	62
17	be [adv] hard [to-vb]	59
18	[be] [adv] hard [to-vb]	59
19	[adv] [adv] hard [to-vb]	59
20	[v-ing] [adv] hard [to-vb]	58
21	[am/are] [adv] hard [to-vb]	56
22	[vb pp] [adv] hard [to-vb]	53
23	are [adv] hard [to-vb]	52
24	[vb base] [adv] hard [to-vb]	33
25	[noun] [adv] hard [to-vb]	32
26	[to-vb] [adv] hard [to-vb]	31
27	worked [adv] hard [to-vb]	31
28	trying [adv] hard [to-vb]	30
29	tried [adv] hard [to-vb]	29
30	[conj] [adv] hard [to-vb]	23