SN4 ""

No	Pattern	Freq
1	be [verb] for twenty year	11
2	[be] [verb] for twenty year	11
3	[been] [verb] for twenty year	10
4	been [verb] for twenty year	10
5	[pron] [verb] for twenty year	7
6	[adv] [verb] for twenty year	6
7	[pers pn] [verb] for twenty year	6
8	[verb] [verb] for twenty year	6
9	[noun] [verb] for twenty year	5
10	have [verb] for twenty year	5
11	[verb] [pron] for twenty year	8
12	[verb] [pers pn] for twenty year	8
13	[verb] [adv] for twenty year	7
14	[verb] [adj] for twenty year	6
15	[verb] [verb] for twenty year	6
16	[verb] [adv] for twenty year	6
17	[verb] [vb pp] for twenty year	5
18	[verb] [noun] for twenty year	5
19	[verb] [det] for twenty year	5
20	[verb] for [adv] twenty year	16
21	[verb] for [adv] twenty year	16
22	[verb] for over twenty year	9
23	[verb] for over twenty year	9
24	[verb] for twenty [num] year	6
25	[verb] for twenty [adj] year	6
26	[verb] for twenty year [prep]	13
27	[verb] for twenty year [prep]	13
28	[verb] for twenty year [coord]	6
29	[verb] for twenty year [conj]	6