SN4 ""

No	Pattern	Freq
1	[pron] is [adv] [that]	498
2	[pers pn] is [adv] [that]	492
3	it is [adv] [that]	477
4	it is [adv] [that]	476
5	[noun] is [adv] [that]	358
6	[noun sg] is [adv] [that]	311
7	[adj] is [adv] [that]	40
8	point is [adv] [that]	31
9	point is [adv] [that]	31
10	[noun pl] is [adv] [that]	30
11	[det] is [adv] [that]	28
12	[adv] is [adv] [that]	25
13	[adv] is [adv] [that]	24
14	this is [adv] [that]	23
15	this is [adv] [that]	23
16	problem is [adv] [that]	20
17	[verb] is [adv] [that]	20
18	problem is [adv] [that]	20
19	[noun prp] is [adv] [that]	14
20	[coord] is [adv] [that]	12
21	[conj] is [adv] [that]	12
22	reason is [adv] [that]	11
23	here is [adv] [that]	11
24	here is [adv] [that]	11
25	reason is [adv] [that]	11
26	answer is [adv] [that]	10
27	answer is [adv] [that]	10
28	[adj] is [adv] [that]	9
29	he is [adv] [that]	8
30	he is [adv] [that]	7