SN4 ""

No	Pattern	Freq
1	[noun] is [adv] that	243
2	[noun sg] is [adv] [that]	214
3	[noun] is simply [that]	47
4	point is [adv] [that]	20
5	point is [adv] [that]	20
6	[noun pl] is [adv] [that]	17
7	[noun] is so [that]	16
8	[noun] is there [that]	14
9	[noun] is precisely [that]	13
10	problem is [adv] [that]	10
11	[noun prp] is [adv] [that]	10
12	[noun] is perhaps [that]	10
13	problem is [adv] [that]	10
14	reason is [adv] [that]	9
15	reason is [adv] [that]	9
16	answer is [adv] [that]	9
17	answer is [adv] [that]	9
18	[noun] is probably [that]	9
19	[noun] is therefore [that]	8
20	[noun] is merely [that]	8
21	[noun] is now [that]	8
22	evidence is [adv] [that]	7
23	evidence is [adv] [that]	7
24	[noun] is often [that]	7
25	[noun] is only [that]	6
26	[noun] is still [that]	6
27	[noun] is right [that]	6
28	difference is [adv] [that]	6
29	difference is [adv] [that]	6
30	[noun] is also [that]	5