SN4 ""

No	Pattern	Freq
1	be [adv] but	464
2	[be] [adv] but	339
3	[was/were] [adv] but	161
4	was [adv] but	130
5	[is] [adv] but	118
6	[be] [adv prt] but	91
7	[be] there but	79
8	[be] there but	79
9	is [adv] but	78
10	[am/are] [adv] but	76
11	be [adv] but	73
12	[be] [adv] but	73
13	are [adv] but	47
14	's [adv] but	40
15	[be] not but	34
16	[be] [not/n't] but	34
17	were [adv] but	31
18	been [adv] but	30
19	[been] [adv] but	30
20	[be] here but	20
21	[be] here but	20
22	[be] not but	20
23	[be] in but	18
24	[be] in but	18
25	're [adv] but	17
26	[be] now but	16
27	[be] now but	16
28	[be] n't but	14
29	[be] over but	13
30	[be] down but	13