SN4 ""

No	Pattern	Freq
1	[Wh det] have been [verb] in	642
2	[Wh det] have been [vb pp] in	592
3	which have been [verb] in	548
4	[Wh det] had been [verb] in	306
5	[Wh det] has been [verb] in	189
6	[Wh det] have been [verb] in	131
7	what have been [verb] in	94
8	[Wh det] have been [v-ing] in	49
9	[Wh det] have been happening in	24
10	[Wh det] have been happen in	24
11	[Wh det] have been describe in	16
12	[Wh det] have been done in	16
13	[Wh det] 's been [verb] in	16
14	[Wh det] have been do in	16
15	[Wh det] have been made in	15
16	[Wh det] have been make in	15
17	[Wh det] have been described in	15
18	[Wh det] have been use in	14
19	[Wh det] have been used in	14
20	[Wh det] have been formed in	12
21	[Wh det] have been established in	12
22	[Wh det] have been form in	12
23	[Wh det] have been develop in	12
24	[Wh det] have been said in	12
25	[Wh det] have been say in	12
26	[Wh det] have been establish in	12
27	[Wh det] have been developed in	11
28	[Wh det] have been built in	10
29	[Wh det] have been build in	10
30	[Wh det] have been published in	10