SN4 ""

No	Pattern	Freq
1	could be [verb] on	329
2	could be [vb pp] on	316
3	could be base on	17
4	could be based on	17
5	could be spend on	17
6	could be spent on	17
7	could be [adj] on	13
8	could be [adj] on	12
9	could be [v-ing] on	12
10	could be do on	10
11	could be done on	10
12	could be use on	9
13	could be make on	9
14	could be put on	9
15	could be [adv] on	9
16	could be made on	9
17	could be put on	9
18	could be used on	9
19	could be justify on	8
20	could be found on	8
21	could be find on	8
22	could be justified on	8
23	could be write on	7
24	could be written on	7
25	could be imposed on	6
26	could be mount on	6
27	could be see on	6
28	could be seen on	6
29	could be rely on	6
30	could be impose on	6