SN4 ""

No	Pattern	Freq
1	[noun] is that it [is]	551
2	[noun sg] is that it [is]	485
3	[verb] is that it [is]	63
4	[adj] is that it [is]	62
5	[pron] is that it [is]	43
6	[noun pl] is that it [is]	39
7	[noun prp] is that it [is]	25
8	[det] is that it [is]	23
9	[pers pn] is that it [is]	22
10	[adv] is that it [is]	22
11	[adv] is that it [is]	22
12	problem is that it [is]	19
13	[to-vb] is that it [is]	18
14	point is that it [is]	18
15	problem is that it [is]	18
16	[adj] is that it [is]	17
17	it is that it [is]	15
18	answer is that it [is]	15
19	it is that it [is]	15
20	this is that it [is]	15
21	point is that it [is]	15
22	this is that it [is]	15
23	answer is that it [is]	15
24	view is that it [is]	14
25	view is that it [is]	14
26	[vb pp] is that it [is]	13
27	thing is that it [is]	12
28	thing is that it [is]	12
29	[vb infin] is that it [is]	12
30	here is that it [is]	11