SN4 ""

No	Pattern	Freq
1	[noun] must be	10998
2	[pron] must be	9038
3	[noun sg] must be	7091
4	[pers pn] must be	6501
5	it must be	3296
6	it must be	3296
7	[noun pl] must be	3261
8	there must be	1466
9	[ex0] must be	1466
10	there must be	1466
11	[adj] must be	1115
12	[det] must be	897
13	you must be	872
14	you must be	870
15	they must be	757
16	[conj] must be	749
17	they must be	724
18	[Wh det] must be	702
19	he must be	579
20	he must be	566
21	which must be	563
22	which must be	563
23	[coord] must be	474
24	this must be	471
25	this must be	471
26	[noun prp] must be	461
27	and must be	391
28	and must be	391
29	[verb] must be	366
30	we must be	359