SN4 ""

No	Pattern	Freq
1	[noun] who had been [v-ing]	189
2	[noun sg] [Wh pn] had been [v-ing]	84
3	[noun pl] [Wh pn] had been [v-ing]	66
4	[noun prp] [Wh pn] had been [v-ing]	28
5	man [Wh pn] had been [v-ing]	19
6	man [Wh pn] had been [v-ing]	16
7	woman [Wh pn] had been [v-ing]	12
8	[n mass] [Wh pn] had been [v-ing]	11
9	people [Wh pn] had been [v-ing]	10
10	people [Wh pn] had been [v-ing]	10
11	[noun] [Wh pn] had been watching	9
12	[noun] [Wh pn] had been drinking	8
13	[noun] [Wh pn] had been waiting	8
14	woman [Wh pn] had been [v-ing]	7
15	[noun] [Wh pn] had been working	7
16	[noun] [Wh pn] had been sitting	7
17	girl [Wh pn] had been [v-ing]	6
18	girl [Wh pn] had been [v-ing]	6
19	[noun] [Wh pn] had been visiting	5
20	patient [Wh pn] had been [v-ing]	5
21	women [Wh pn] had been [v-ing]	5
22	[noun] [Wh pn] had been living	5
23	[noun] [Wh pn] had been missing	5