SN4 ""

No	Pattern	Freq
1	[verb] to do it [adj]	84
2	[v-ing] to do it [adj]	24
3	have to do it [adj]	24
4	[vb infin] to do it [adj]	22
5	[noun] to do it [adj]	21
6	[noun sg] to do it [adj]	18
7	[adj] to do it [adj]	17
8	[vb pp] to do it [adj]	15
9	go to do it [adj]	14
10	going to do it [adj]	14
11	have to do it [adj]	12
12	[vb past] to do it [adj]	12
13	[adj] to do it [adj]	12
14	[pron] to do it [adj]	12
15	try to do it [adj]	10
16	want to do it [adj]	10
17	[pers pn] to do it [adj]	8
18	[vb base] to do it [adj]	7
19	[adv] to do it [adj]	7
20	[modal v] to do it [adj]	6
21	used to do it [adj]	6
22	used to do it [adj]	6
23	[vb mod] to do it [adj]	6
24	[adj -er] to do it [adj]	5
25	trying to do it [adj]	5
26	had to do it [adj]	5
27	to do [prep] it [adj]	7
28	to do with it [adj]	7
29	to do with it [adj]	7
30	to do [prep] it [adj]	7