SN4 ""

No	Pattern	Freq
1	[vb mod] have been useful	21
2	[modal v] have been useful	21
3	would have been useful	15
4	would have been useful	15
5	[noun] have been useful	10
6	[pron] have been useful	7
7	[noun sg] have been useful	7
8	[pers pn] have been useful	5
9	have [adv] been useful	5
10	have been [adv] useful	24
11	have been [adv] useful	24
12	have been [art] useful	10
13	have been a useful	10
14	have been [art] useful	10
15	have been a useful	10
16	have been find useful	9
17	have been found useful	9
18	have been [verb] useful	9
19	have been [vb pp] useful	9
20	have been very useful	8
21	have been very useful	8
22	have been useful [prep]	20
23	have been useful [prep]	20
24	have been useful in	11
25	have been useful in	11
26	have been useful [to-vb]	5
27	have been useful to	5
28	have been useful to	5
29	have been useful [verb]	5