SN4 ""

No	Pattern	Freq
1	have [vb pp] [prep] the past	280
2	[verb] [vb pp] in the past	123
3	[vb base] [vb pp] [prep] the past	118
4	[vb -s] [vb pp] [prep] the past	110
5	has [vb pp] [prep] the past	105
6	[verb] [vb pp] over the past	101
7	have [vb pp] [prep] the past	101
8	[vb past] [vb pp] [prep] the past	43
9	had [vb pp] [prep] the past	40
10	[verb] [vb pp] for the past	30
11	[verb] doubled [prep] the past	21
12	[verb] done [prep] the past	20
13	[verb] [vb pp] during the past	20
14	've [vb pp] [prep] the past	17
15	[verb] had [prep] the past	10
16	[verb] made [prep] the past	9
17	[verb] happened [prep] the past	8
18	[verb] died [prep] the past	7
19	[verb] changed [prep] the past	7
20	[verb] occurred [prep] the past	6
21	[verb] tripled [prep] the past	6
22	[verb] developed [prep] the past	6
23	[verb] increased [prep] the past	6
24	's [vb pp] [prep] the past	5