SN4 ""

No	Pattern	Freq
1	[verb] to do it [prep]	243
2	have to do it [prep]	75
3	[noun] to do it [prep]	71
4	[vb infin] to do it [prep]	58
5	[noun sg] to do it [prep]	57
6	[vb past] to do it [prep]	50
7	[adj] to do it [prep]	45
8	[vb pp] to do it [prep]	45
9	[vb base] to do it [prep]	41
10	[pron] to do it [prep]	39
11	[adj] to do it [prep]	37
12	have to do it [prep]	30
13	[v-ing] to do it [prep]	30
14	want to do it [prep]	29
15	[adv] to do it [prep]	27
16	[pers pn] to do it [prep]	25
17	had to do it [prep]	21
18	[conj] to do it [prep]	21
19	[coord] to do it [prep]	20
20	going to do it [prep]	19
21	go to do it [prep]	19
22	get to do it [prep]	18
23	got to do it [prep]	16
24	able to do it [prep]	14
25	have to do it [prep]	14
26	able to do it [prep]	14
27	[Wh adv] to do it [prep]	13
28	[vb -s] to do it [prep]	13
29	how to do it [prep]	13
30	how to do it [prep]	13