SN4 ""

No	Pattern	Freq
1	[noun pl] are useful for [verb]	19
2	[noun] are useful for [verb]	19
3	are [adv] useful for [verb]	24
4	are [adv] useful for [verb]	24
5	are also useful for [verb]	8
6	are also useful for [verb]	8
7	are very useful for [verb]	7
8	are very useful for [verb]	7
9	are particularly useful for [verb]	6
10	are particularly useful for [verb]	6
11	are useful for [verb] [noun]	7
12	are useful for [verb] the	5
13	are useful for [verb] [noun pl]	5
14	are useful for [verb] [art]	5
15	are useful for [verb] [art]	5
16	are useful for [verb] the	5