SN4 ""

No	Pattern	Freq
1	have tended [to-vb]	292
2	has tended [to-vb]	156
3	had tended [to-vb]	40
4	have tended to concentrate	24
5	have tended [to-vb]	14
6	have tended to focus	14
7	have tended to become	13
8	have tended to increase	10
9	have tended to see	9
10	have tended to dominate	9
11	've tended [to-vb]	8
12	have tended to ignore	8
13	have tended to suggest	8
14	have tended to do	8
15	have tended to move	7
16	have tended to fall	7
17	have tended to use	7
18	have tended to regard	6
19	have tended to have	6
20	have tended to support	6
21	have tended to take	6
22	have tended to neglect	6
23	have tended to get	5
24	have tended to produce	5
25	have tended to limit	5
26	have tended to favour	5
27	have tended to confirm	5