SN4 ""

No	Pattern	Freq
1	[adv] have been possible [prep]	40
2	[not/n't] have been possible [prep]	31
3	not have been possible [prep]	31
4	not have been possible [prep]	30
5	[vb mod] have been possible [prep]	22
6	[modal v] have been possible [prep]	22
7	would have been possible [prep]	13
8	would have been possible [prep]	13
9	[adv] have been possible [prep]	9
10	have been possible [prep] [art]	27
11	have been possible [prep] [art]	27
12	have been possible [prep] the	23
13	have been possible [prep] the	23
14	have been possible [prep] [adj]	14
15	have been possible [prep] [pron]	11
16	have been possible [prep] [noun]	10
17	have been possible [prep] [det]	7
18	have been possible [prep] [noun prp]	6
19	have been possible [prep] [pers pn]	6
20	have been possible [prep] this	5
21	have been possible [prep] this	5
22	have been possible [prep] [adj]	5