SN4 ""

No	Pattern	Freq
1	[pers pn] should be [vb pp]	3346
2	it should be [vb pp]	2131
3	it should be [vb pp]	2131
4	they should be [vb pp]	720
5	they should be [vb pp]	703
6	[pron] should be noted	591
7	[Wh det] should be [vb pp]	575
8	which should be [vb pp]	399
9	which should be [vb pp]	399
10	he should be [vb pp]	224
11	he should be [vb pp]	219
12	[pron] should be done	190
13	what should be [vb pp]	176
14	what should be [vb pp]	176
15	[pron] should be remembered	145
16	[indef pn] should be [vb pp]	129
17	[pron] should be allowed	106
18	[pron] should be given	88
19	who should be [vb pp]	86
20	[Wh pn] should be [vb pp]	86
21	who should be [vb pp]	86
22	we should be [vb pp]	83
23	we should be [vb pp]	81
24	[pron] should be made	81
25	[pron] should be used	78
26	she should be [vb pp]	73
27	she should be [vb pp]	72
28	[pron] should be stressed	68
29	you should be [vb pp]	65
30	[pron] should be kept	64