SN4 ""

No	Pattern	Freq
1	[conj] [pers pn] is [to-vb]	506
2	[subord] [pron] is [to-vb]	443
3	[conj] it is [to-vb]	369
4	[conj] it is [to-vb]	369
5	if [pron] is [to-vb]	301
6	if [pron] is [to-vb]	301
7	[conj] he is [to-vb]	100
8	[conj] he is [to-vb]	100
9	that [pron] is [to-vb]	77
10	that [pron] is [to-vb]	77
11	[that] [pron] is [to-vb]	77
12	[coord] [pron] is [to-vb]	67
13	as [pron] is [to-vb]	62
14	as [pron] is [to-vb]	62
15	than [pron] is [to-vb]	51
16	than [pron] is [to-vb]	51
17	and [pron] is [to-vb]	44
18	and [pron] is [to-vb]	44
19	[conj] she is [to-vb]	34
20	[conj] she is [to-vb]	34
21	[conj] [indef pn] is [to-vb]	34
22	[conj] [Wh pn] is [to-vb]	30
23	[conj] who is [to-vb]	28
24	[conj] who is [to-vb]	28
25	[conj] [pron] is to have	25
26	[conj] one is [to-vb]	24
27	[conj] one is [to-vb]	24
28	[conj] [pron] is to make	20
29	[conj] [pron] is to say	16
30	but [pron] is [to-vb]	16