[ابو بيشو]

The amount of crime have increased.
The amount of crime has increased.
.................................................. .................................................. ................................
A tremendous amount of research have been carried out.
A tremendous amount of research has been carried out.
amount of (singular) + uncountable noun + singular verb
amounts of (plural) + uncountable noun + plural verb
Compare: 'A large amount of money is required.' 'Large amounts of
money are required.'