SN4 ""

No	Pattern	Freq
1	have been [verb] on a [adj]	143
2	have be [vb pp] on a [adj]	124
3	have be [verb] on a [adj]	118
4	has be [verb] on a [adj]	53
5	had be [verb] on a [adj]	39
6	have be [verb] on a [adj]	31
7	have be [verb] on an [adj]	25
8	have be [v-ing] on a [adj]	19
9	have be base on a [adj]	11
10	have be based on a [adj]	11
11	have be [verb] on a [adj]	8
12	have be working on a [adj]	8
13	have be work on a [adj]	8
14	have be spend on a [adj]	7
15	have be [verb] on a new	7
16	have be spent on a [adj]	7
17	have be [verb] on a previous	6
18	have be built on a [adj]	5
19	have be develop on a [adj]	5
20	have be build on a [adj]	5
21	have be placed on a [adj]	5
22	have be [verb] on a long	5
23	have be developed on a [adj]	5
24	have be employed on a [adj]	5
25	have be [verb] on a large	5
26	have be place on a [adj]	5
27	have be employ on a [adj]	5