SN4 ""

No	Pattern	Freq
1	which have been [vb pp]	4261
2	which had been [vb pp]	1857
3	which has been [vb pp]	1328
4	which have been [vb pp]	1075
5	which have been made	117
6	which have been used	103
7	which have been set	79
8	which have been developed	70
9	which have been taken	54
10	which have been given	54
11	which have been built	51
12	which have been established	49
13	which have been described	44
14	which have been put	42
15	which have been shown	40
16	which have been left	38
17	which have been found	38
18	which have been introduced	36
19	which have been agreed	33
20	which have been identified	33
21	which have been created	32
22	which have been designed	31
23	which have been brought	30
24	which have been raised	29
25	which have been adopted	29
26	which have been held	27
27	which have been carried	25
28	which have been placed	24
29	which have been drawn	24
30	which have been closed	24