SN4 ""

No	Pattern	Freq
1	have [adv] been going on for	5
2	have [adv] been going on for	5
3	[noun] have been going on for	34
4	[pron] have been going on for	31
5	[noun sg] have been going on for	20
6	[pers pn] have been going on for	20
7	it have been going on for	17
8	it have been going on for	17
9	[Wh det] have been going on for	11
10	which have been going on for	10
11	[adj] have been going on for	10
12	[det] have been going on for	10
13	which have been going on for	10
14	[noun pl] have been going on for	9
15	this have been going on for	7
16	this have been going on for	7
17	that have been going on for	7
18	that have been going on for	7
19	[conj] have been going on for	7
20	[that] have been going on for	7
21	[noun prp] have been going on for	5
22	have been going on [adv] for	6
23	have been going on [adv] for	5
24	have been going on for [adj]	32
25	have been going on for [noun pl]	23
26	have been going on for [noun]	23
27	have been going on for [det]	18
28	have been going on for [adv]	17
29	have been going on for [adv]	17
30	have been going on for [num]	14