Table 4. The frequency of errors by subtypes of function words

FN subtype (a) Raw count % in total error (b) Subtype total % in subtype (=a/b)
Aux-Cont 118 25 1,076 11.0
To (inf) 24 5 253 9.5
ART 105 22 1,174 8.9
Neg-Cont 9 2 205 4.4
CONJ 39 8 921 4.2
PREP 88 19 2,298 3.8
POSS 23 5 714 3.2
AUX 32 7 1,123 2.8
DEM 19 4 612 2.0
PRO 14 3 2,660 0.8