5.a) David (not to repair) his bicycle every week.
b) David (not to repair) his bicycle now.
c) David (not to repair) his bicycle last month.
d) David (not to repair) his bicycle in a week.
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a) David doesn't repair his bicycle every week.

b) David isn't repairing his bicycle now.

c) David didn't repair his bicycle last month.

d) David will not repair his bicycle in a week.

a doesn't repair

b isn't repairing

c didn't repair

d will repair