SN4 ""

No	Pattern	Freq
1	[prep] [Wh det] is that	34
2	[prep] [Wh det] is that	34
3	of [Wh det] is that	32
4	of [Wh det] is that	32
5	[noun] [Wh det] is that	22
6	[noun sg] [Wh det] is that	22
7	[Wh det] [pers pn] is that	148
8	[Wh det] it is that	148
9	[Wh det] it is that	148
10	[Wh det] [pron] is that	148
11	[Wh det] [verb] is that	81
12	[Wh det] [vb -s] is that	72
13	[Wh det] happen is that	42
14	[Wh det] happens is that	33
15	[Wh det] matter is that	26
16	[Wh det] matters is that	26
17	[Wh det] [noun] is that	20
18	[Wh det] [noun sg] is that	19
19	[Wh det] happened is that	9
20	[Wh det] [vb past] is that	9
21	[Wh det] emerge is that	7
22	[Wh det] emerges is that	7
23	[Wh det] is [pron] that	113
24	[Wh det] is it that	91
25	[Wh det] is [pers pn] that	91
26	[Wh det] is it that	91
27	[Wh det] is [verb] that	40
28	[Wh det] is [to-vb] that	24
29	[Wh det] is [adj] that	23
30	[Wh det] is [indef pn] that	22