SN4 ""

No	Pattern	Freq
1	[verb] what [pron] is [that]	39
2	[adv] what [pron] is [that]	27
3	[prep] what [pron] is [that]	24
4	[prep] what [pron] is [that]	24
5	[to-vb] what [pron] is [that]	21
6	[adv] what [pron] is [that]	21
7	exactly what [pron] is [that]	13
8	exactly what [pron] is [that]	13
9	about what [pron] is [that]	11
10	about what [pron] is [that]	11
11	[noun] what [pron] is [that]	11
12	[noun sg] what [pron] is [that]	9
13	of what [pron] is [that]	8
14	of what [pron] is [that]	8
15	[conj] what [pron] is [that]	7
16	[coord] what [pron] is [that]	7
17	[vb infin] what [pron] is [that]	7
18	and what [pron] is [that]	6
19	out what [pron] is [that]	6
20	[adv prt] what [pron] is [that]	6
21	and what [pron] is [that]	6
22	out what [pron] is [that]	6
23	[v-ing] what [pron] is [that]	5
24	know what [pron] is [that]	5
25	[pron] what [pron] is [that]	5
26	what [verb] [pron] is [that]	28
27	what [vb -s] [pron] is [that]	28
28	what [noun] [pron] is [that]	6
29	what [noun sg] [pron] is [that]	5
30	what worries [pron] is [that]	5