SN4 ""

No	Pattern	Freq
1	[Wh det] have been [v-ing]	554
2	which have be [v-ing]	362
3	[Wh det] has be [v-ing]	228
4	[Wh det] had be [v-ing]	198
5	what have be [v-ing]	191
6	[Wh det] have be happening	105
7	[Wh det] have be going	93
8	[Wh det] 's be [v-ing]	83
9	[Wh det] have be [v-ing]	46
10	[Wh det] have be running	18
11	[Wh det] have be working	12
12	[Wh det] have be building	10
13	[Wh det] have be operating	9
14	[Wh det] have be taking	8
15	[Wh det] have be making	7
16	[Wh det] have be missing	7
17	[Wh det] have be lacking	6
18	[Wh det] have be growing	6
19	[Wh det] have be looking	6
20	[Wh det] have be lying	5
21	[Wh det] have be developing	5