SN4 ""

No	Pattern	Freq
1	[noun] have been to establish	10
2	[noun sg] have been to establish	8
3	have been [adj] to establish	24
4	have been [adj] to establish	24
5	have been [verb] to establish	17
6	have been [vb pp] to establish	14
7	have been unable to establish	8
8	have been unable to establish	8
9	have been able to establish	7
10	have been able to establish	7
11	have been to establish [art]	7
12	have been to establish [art]	7
13	have been to establish the	6
14	have been to establish the	6