SN4 ""

No	Pattern	Freq
1	[verb] [conj] it have been	413
2	[verb] [that] it have been	250
3	[verb] that it have been	250
4	[verb] that it have been	250
5	[verb] [conj] it had been	243
6	[verb] [subord] it have been	138
7	[verb] [conj] it has been	136
8	[vb past] [conj] it have been	121
9	[vb pp] [conj] it have been	87
10	say [conj] it have been	45
11	[verb] if it have been	44
12	[verb] if it have been	44
13	[vb base] [conj] it have been	43
14	[to-vb] [conj] it have been	43
15	[vb infin] [conj] it have been	40
16	[vb -s] [conj] it have been	40
17	[v-ing] [conj] it have been	39
18	[verb] [conj] it 's been	32
19	[verb] [coord] it have been	25
20	[verb] as it have been	19
21	[verb] as it have been	19
22	know [conj] it have been	16
23	[verb] and it have been	15
24	[verb] and it have been	15
25	see [conj] it have been	15
26	[verb] like it have been	14
27	[verb] like it have been	14
28	said [conj] it have been	13
29	[verb] because it have been	13
30	[verb] whether it have been	13