SN4 ""

No	Pattern	Freq
1	[noun] is useful for [verb]	24
2	[noun sg] is useful for [verb]	22
3	[pron] is useful for [verb]	10
4	which is useful for [verb]	6
5	which is useful for [verb]	6
6	[Wh det] is useful for [verb]	6
7	is [adv] useful for [verb]	28
8	is [adv] useful for [verb]	28
9	is also useful for [verb]	10
10	is also useful for [verb]	10
11	is particularly useful for [verb]	10
12	is particularly useful for [verb]	10
13	is useful for [verb] [noun]	11
14	is useful for [verb] [art]	11
15	is useful for [verb] [art]	11
16	is useful for [verb] the	9
17	is useful for [verb] the	9
18	is useful for [verb] [adj]	8
19	is useful for [verb] [noun pl]	7
20	is useful for [verb] [adv]	6