None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.
have
has
shall
do
could
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平行结构。比较结构的平行对称。即使前面用的动词是have,跟它平行对称的也必须是do或did,have done, will have done等。因此只用have的必错。前面用的谓语是do not commit因此用do和它平行对称。
平行结构。比较结构的平行对称。即使前面用的动词是have,跟它平行对称的也必须是do或did,have done, will have done等。因此只用have的必错。前面用的谓语是do not commit因此用do和它平行对称。
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