SN4 ""

No	Pattern	Freq
1	[pers pn] is [adv] [adj] [to-vb]	5727
2	it is [adv] [adj] [to-vb]	5467
3	it is [adv] [adj] [to-vb]	5467
4	[pron] is [adv] [adj] [to-vb]	4476
5	[pron] is not [adj] [to-vb]	1516
6	[pron] is [not/n't] [adj] [to-vb]	1516
7	[pron] is not [adj] [to-vb]	1444
8	[pron] is [adv] possible [to-vb]	972
9	[pron] is [adv] difficult [to-vb]	729
10	[pron] is also [adj] [to-vb]	516
11	[pron] is also [adj] [to-vb]	516
12	[pron] is [adv] easy [to-vb]	502
13	[pron] is [adv] necessary [to-vb]	464
14	[pron] is very [adj] [to-vb]	450
15	[pron] is very [adj] [to-vb]	450
16	[pron] is [adv] important [to-vb]	384
17	[pron] is more [adj] [to-vb]	264
18	[pron] is more [adj] [to-vb]	264
19	[pron] is [adv] [adj] to see	243
20	[pron] is [adv] [adj] to say	234
21	[pron] is [adv] [adj] to find	220
22	[pron] is therefore [adj] [to-vb]	206
23	[pron] is therefore [adj] [to-vb]	206
24	he is [adv] [adj] [to-vb]	204
25	he is [adv] [adj] [to-vb]	202
26	[pron] is [adv] [adj] to have	194
27	[pron] is often [adj] [to-vb]	192
28	[pron] is often [adj] [to-vb]	192
29	[pron] is too [adj] [to-vb]	184
30	[pron] is too [adj] [to-vb]	184