SN4 ""

No	Pattern	Freq
1	should be [verb] to	1848
2	should [be] [vb pp] to	1810
3	should [be] given to	216
4	should [be] give to	216
5	should [be] send to	159
6	should [be] sent to	159
7	should [be] made to	115
8	should [be] make to	115
9	should [be] left to	57
10	should [be] leave to	57
11	should [be] paid to	51
12	should [be] pay to	51
13	should [be] referred to	47
14	should [be] addressed to	47
15	should [be] refer to	47
16	should [be] address to	47
17	should [be] returned to	46
18	should [be] return to	46
19	should [be] add to	40
20	should [be] added to	40
21	should [be] restricted to	37
22	should [be] [v-ing] to	37
23	should [be] restrict to	37
24	should [be] bring to	34
25	should [be] brought to	34
26	should [be] kept to	31
27	should [be] keep to	31
28	should [be] extend to	31
29	should [be] apply to	30
30	should [be] extended to	30