SN4 ""

No	Pattern	Freq
1	required [to-vb] the [noun]	526
2	required [verb] the [noun sg]	412
3	required [verb] the [noun pl]	101
4	required to make the [noun]	18
5	required make the [noun]	18
6	required to meet the [noun]	15
7	required meet the [noun]	15
8	required [verb] the [noun prp]	12
9	required to complete the [noun]	12
10	required give the [noun]	12
11	required to give the [noun]	12
12	required complete the [noun]	12
13	required [verb] the land	8
14	required [verb] the land	8
15	required to keep the [noun]	8
16	required keep the [noun]	8
17	required operate the [noun]	7
18	required to operate the [noun]	7
19	required support the [noun]	7
20	required [verb] the system	7
21	required to support the [noun]	7
22	required [verb] the system	7
23	required understand the [noun]	6
24	required [verb] the work	6
25	required to take the [noun]	6
26	required do the [noun]	6
27	required to understand the [noun]	6
28	required produce the [noun]	6
29	required [verb] the work	6
30	required to produce the [noun]	6