SN4 ""

No	Pattern	Freq
1	[pers pn] have been [v-ing] for [noun pl]	71
2	[pers pn] have [been] [v-ing] for years	26
3	[pers pn] 've [been] [v-ing] for [noun pl]	25
4	i have [been] [v-ing] for [noun pl]	20
5	[pers pn] had [been] [v-ing] for [noun pl]	18
6	we have [been] [v-ing] for [noun pl]	15
7	[pers pn] have [been] [v-ing] for [noun pl]	13
8	[pers pn] have [been] [v-ing] for ages	12
9	they have [been] [v-ing] for [noun pl]	11
10	she have [been] [v-ing] for [noun pl]	9
11	[pers pn] have [been] trying for [noun pl]	8
12	[pers pn] 's [been] [v-ing] for [noun pl]	7
13	[pers pn] have [been] [v-ing] for days	7
14	[pers pn] have [been] [v-ing] for weeks	7
15	it have [been] [v-ing] for [noun pl]	6
16	he have [been] [v-ing] for [noun pl]	6
17	[pers pn] 'd [been] [v-ing] for [noun pl]	6
18	[pers pn] have [been] waiting for [noun pl]	6
19	[pers pn] have [been] [v-ing] for hours	5