SN4 ""

No	Pattern	Freq
1	[conj] it become necessary	25
2	[subord] it become necessary	18
3	if it become necessary	8
4	when it become necessary	8
5	if it become necessary	8
6	when it become necessary	8
7	[adv] it become necessary	7
8	[adv] it become necessary	6
9	and it become necessary	5
10	and it become necessary	5
11	[coord] it become necessary	5
12	it [modal v] become necessary	15
13	it [vb mod] become necessary	15
14	it [adv] become necessary	10
15	it have become necessary	10
16	it [adv] become necessary	10
17	it [verb] become necessary	10
18	it may become necessary	9
19	it may become necessary	9
20	it [vb past] become necessary	6
21	it had become necessary	6
22	it become necessary [verb]	41
23	it become necessary [to-vb]	41
24	it become necessary [prep]	8
25	it become necessary [prep]	8
26	it become necessary for	6
27	it become necessary for	6