SN4 ""

No	Pattern	Freq
1	[be] [verb] whether	774
2	[be] [adj] whether	563
3	[be] [adj] whether	561
4	[be] [vb pp] whether	388
5	[be] [v-ing] whether	236
6	[be] doubtful whether	175
7	[be] doubtful whether	175
8	[be] [to-vb] whether	148
9	[be] [adv] whether	129
10	[be] see whether	127
11	[be] ask whether	124
12	[be] wonder whether	106
13	[be] wondering whether	101
14	[be] asked whether	99
15	[be] seen whether	95
16	[be] [not/n't] whether	90
17	[be] not whether	90
18	[be] not whether	88
19	[be] unclear whether	70
20	[be] unclear whether	70
21	[be] uncertain whether	62
22	[be] uncertain whether	62
23	[be] consider whether	54
24	[be] decide whether	48
25	[be] determine whether	41
26	[be] [conj] whether	41
27	[be] considering whether	40
28	[be] questionable whether	35
29	[be] questionable whether	35
30	[be] [adv] whether	34