SN4 ""

No	Pattern	Freq
1	necessary [to-vb]	4887
2	necessary make	134
3	necessary have	131
4	necessary to make	131
5	necessary to have	124
6	necessary to consider	122
7	necessary consider	122
8	necessary ensure	105
9	necessary to ensure	103
10	necessary use	91
11	necessary to use	84
12	necessary take	72
13	necessary give	70
14	necessary to take	69
15	necessary [vb base]	67
16	necessary to give	67
17	necessary to provide	61
18	necessary provide	61
19	necessary look	60
20	necessary to establish	60
21	necessary to look	60
22	necessary establish	60
23	necessary examine	60
24	necessary to examine	60
25	necessary understand	58
26	necessary to understand	58
27	necessary to achieve	57
28	necessary achieve	57
29	necessary to keep	56
30	necessary keep	56