SN4 ""

No	Pattern	Freq
1	[pron] [is] [verb] that a	255
2	[pers pn] [is] [verb] that a	253
3	it [is] [verb] that a	250
4	it [is] [verb] that a	250
5	[noun] [is] [verb] that a	41
6	[noun sg] [is] [verb] that a	34
7	[is] [adj] [verb] that a	103
8	[is] [adv] [verb] that a	101
9	[is] [adj] [verb] that a	101
10	[is] [adv] [verb] that a	82
11	[is] important [verb] that a	23
12	[is] important [verb] that a	23
13	[is] [not/n't] [verb] that a	19
14	[is] not [verb] that a	19
15	[is] not [verb] that a	17
16	[is] [prep] [verb] that a	12
17	[is] worth [verb] that a	12
18	[is] [prep] [verb] that a	12
19	[is] also [verb] that a	12
20	[is] also [verb] that a	12
21	[is] worth [verb] that a	12
22	[is] generally [verb] that a	11
23	[is] generally [verb] that a	11
24	[is] hard [verb] that a	10
25	[is] difficult [verb] that a	10
26	[is] difficult [verb] that a	10
27	[is] hard [verb] that a	10
28	[is] well [verb] that a	9
29	[is] well [verb] that a	9
30	[is] interesting [verb] that a	8