SN4 ""

No	Pattern	Freq
1	[pers pn] [vb base] to do [det]	247
2	[pers pn] [verb] to do that	205
3	you [verb] to do [det]	192
4	[pers pn] [vb past] to do [det]	172
5	[pers pn] [verb] to do this	170
6	[pers pn] want to do [det]	156
7	[pers pn] have to do [det]	145
8	i [verb] to do [det]	137
9	we [verb] to do [det]	102
10	[pers pn] [vb infin] to do [det]	87
11	[pers pn] want to do [det]	74
12	[pers pn] [verb] to do some	67
13	he [verb] to do [det]	64
14	[pers pn] have to do [det]	62
15	[pers pn] had to do [det]	54
16	they [verb] to do [det]	49
17	[pers pn] [verb] to do all	47
18	[pers pn] need to do [det]	46
19	[pers pn] [vb -s] to do [det]	40
20	[pers pn] need to do [det]	37
21	[pers pn] wanted to do [det]	35
22	[pers pn] [v-ing] to do [det]	34
23	[pers pn] want to do [det]	34
24	[pers pn] go to do [det]	33
25	she [verb] to do [det]	31
26	[pers pn] going to do [det]	29
27	[pers pn] [verb] to do more	28
28	[pers pn] [verb] to do any	21
29	[pers pn] have to do [det]	19
30	[pers pn] like to do [det]	19