SN4 ""

No	Pattern	Freq
1	[is] [adj] [to-vb] the [noun sg]	1903
2	is [adj] [to-vb] the [noun sg]	1742
3	[is] possible [to-vb] the [noun sg]	197
4	[is] necessary [to-vb] the [noun sg]	174
5	[is] difficult [to-vb] the [noun sg]	170
6	's [adj] [to-vb] the [noun sg]	161
7	[is] important [to-vb] the [noun sg]	152
8	[is] likely [to-vb] the [noun sg]	135
9	[is] hard [to-vb] the [noun sg]	83
10	[is] able [to-vb] the [noun sg]	78
11	[is] easy [to-vb] the [noun sg]	73
12	[is] impossible [to-vb] the [noun sg]	65
13	[is] [adj] to see the [noun sg]	60
14	[is] essential [to-vb] the [noun sg]	45
15	[is] unlikely [to-vb] the [noun sg]	44
16	[is] [adj] to consider the [noun sg]	42
17	[is] [adj] [to-vb] the conclusion	40
18	[is] [adj] to use the [noun sg]	38
19	[is] entitled [to-vb] the [noun sg]	37
20	[is] [adj] to make the [noun sg]	35
21	[is] [adj] to avoid the [noun sg]	35
22	[is] sufficient [to-vb] the [noun sg]	34
23	[is] [adj] [to-vb] the extent	32
24	[is] unable [to-vb] the [noun sg]	32
25	[is] [adj] to assess the [noun sg]	31
26	[is] [adj] to understand the [noun sg]	30
27	[is] [adj] to get the [noun sg]	29
28	[is] [adj] to take the [noun sg]	23
29	[is] right [to-vb] the [noun sg]	22
30	[is] supposed [to-vb] the [noun sg]	21