SN4 ""

No	Pattern	Freq
1	required to make	146
2	required to do	114
3	required to give	109
4	required to pay	96
5	required to use	81
6	required to take	80
7	required to provide	74
8	required to produce	74
9	required to have	53
10	required to ensure	49
11	required to work	47
12	required to maintain	47
13	required to carry	43
14	required to keep	43
15	required to submit	42
16	required to meet	39
17	required to complete	37
18	required to obtain	33
19	required to achieve	33
20	required to operate	30
21	required to undertake	30
22	required to perform	30
23	required to bring	30
24	required to attend	30
25	required to support	29
26	required to establish	24
27	required to register	24
28	required to show	23
29	required to determine	23
30	required to comply	23