SN4 ""

No	Pattern	Freq
1	[is] [adv] [adj] that [det]	385
2	is [adv] [adj] that [det]	350
3	[is] [adv] [adj] that this	77
4	[is] [adv] [adj] that some	58
5	[is] [adv] [adj] that many	48
6	[is] also [adj] that [det]	47
7	's [adv] [adj] that [det]	38
8	[is] [adv] true that [det]	37
9	[is] [adv] [adj] that any	37
10	[is] [adv] true that [det]	37
11	[is] [adv] clear that [det]	36
12	[is] [adv] clear that [det]	36
13	[is] [adv] possible that [det]	35
14	[is] [adv] possible that [det]	35
15	[is] so [adj] that [det]	34
16	[is] [adv] likely that [det]	33
17	[is] [adv] likely that [det]	33
18	[is] quite [adj] that [det]	33
19	[is] [adv] unlikely that [det]	31
20	[is] [adv] unlikely that [det]	31
21	[is] [adv] [adj] that all	29
22	[is] very [adj] that [det]	26
23	[is] [adv] [adj] that such	26
24	[is] [adv] [adj] that these	25
25	[is] [adv] important that [det]	23
26	[is] [adv] important that [det]	23
27	[is] [adv] [adj] that most	21
28	[is] hardly [adj] that [det]	20
29	[is] [adv] surprising that [det]	19
30	[is] [adv] surprising that [det]	19