SN4 ""

No	Pattern	Freq
1	[noun] is [that] [pron] is	768
2	[noun sg] is [that] [pron] is	652
3	[adj] is [that] [pron] is	97
4	[verb] is [that] [pron] is	86
5	[noun pl] is [that] [pron] is	64
6	[pron] is [that] [pron] is	54
7	[noun prp] is [that] [pron] is	47
8	problem is [that] [pron] is	42
9	problem is [that] [pron] is	38
10	[det] is [that] [pron] is	36
11	[pers pn] is [that] [pron] is	33
12	[adv] is [that] [pron] is	28
13	[adv] is [that] [pron] is	26
14	answer is [that] [pron] is	25
15	point is [that] [pron] is	25
16	[to-vb] is [that] [pron] is	25
17	answer is [that] [pron] is	25
18	[adj] is [that] [pron] is	25
19	it is [that] [pron] is	24
20	this is [that] [pron] is	24
21	this is [that] [pron] is	24
22	it is [that] [pron] is	24
23	[num ord] is [that] [pron] is	23
24	view is [that] [pron] is	23
25	view is [that] [pron] is	23
26	point is [that] [pron] is	22
27	[vb pp] is [that] [pron] is	20
28	say is [that] [pron] is	14
29	[v-ing] is [that] [pron] is	13
30	first is [that] [pron] is	13