SN4 ""

No	Pattern	Freq
1	[pron] could be useful	23
2	[pers pn] could be useful	15
3	[noun] could be useful	12
4	[conj] could be useful	9
5	which could be useful	8
6	[noun sg] could be useful	8
7	which could be useful	8
8	[Wh det] could be useful	8
9	that could be useful	6
10	[det] could be useful	6
11	[adj] could be useful	6
12	that could be useful	6
13	[that] could be useful	6
14	it could be useful	5
15	it could be useful	5
16	could [adv] be useful	9
17	could [adv] be useful	7
18	could be [adv] useful	22
19	could be [adv] useful	22
20	could be [art] useful	18
21	could be a useful	18
22	could be a useful	18
23	could be [art] useful	18
24	could be very useful	9
25	could be very useful	9
26	could be useful [prep]	26
27	could be useful [prep]	26
28	could be useful to	8
29	could be useful to	8
30	could be useful in	6