SN4 ""

No	Pattern	Freq
1	[vb base] [verb] to be	1266
2	[vb base] [vb pp] to be	977
3	[vb base] get to be	527
4	[vb base] got to be	526
5	have [verb] to be	520
6	've [verb] to be	472
7	do [verb] to be	157
8	[vb base] [vb infin] to be	156
9	[vb base] have to be	151
10	[vb base] had to be	99
11	[vb base] tend to be	84
12	[vb base] prove to be	75
13	[vb base] proved to be	70
14	[vb base] tended to be	61
15	[vb base] need to be	58
16	[vb base] seem to be	53
17	[vb base] seem to be	44
18	[vb base] come to be	43
19	[vb base] come to be	43
20	[vb base] [to-vb] to be	42
21	[vb base] [vb base] to be	39
22	[vb base] [vb -s] to be	32
23	[vb base] need to be	31
24	[vb base] have to be	30
25	[vb base] continue to be	28
26	[vb base] try to be	25
27	[vb base] continued to be	19
28	[vb base] appear to be	18
29	[vb base] [v-ing] to be	17
30	[vb base] ceased to be	16