SN4 ""

No	Pattern	Freq
1	what [pers pn] 've been [v-ing] [prep]	53
2	what [pers pn] have been [v-ing] for	47
3	what we have been [v-ing] [prep]	35
4	what i have been [v-ing] [prep]	34
5	what [pers pn] have been doing [prep]	32
6	what [pers pn] have been [v-ing] [prep]	28
7	what [pers pn] had been [v-ing] [prep]	27
8	what [pers pn] have been [v-ing] about	22
9	what you have been [v-ing] [prep]	19
10	what he have been [v-ing] [prep]	19
11	what [pers pn] have been saying [prep]	17
12	what [pers pn] have been talking [prep]	17
13	what [pers pn] 'd been [v-ing] [prep]	17
14	what [pers pn] have been [v-ing] in	14
15	what they have been [v-ing] [prep]	13
16	what [pers pn] have been looking [prep]	12
17	what [pers pn] have been [v-ing] to	10
18	what [pers pn] have been waiting [prep]	9
19	what [pers pn] have been [v-ing] at	9
20	what [pers pn] have been [v-ing] with	9
21	what she have been [v-ing] [prep]	8