{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} he says, don't trust him.

例句: You will fail the exam if you don't work hard.

=lf you don't work hard, you will fail the exam.

=You will fail the exam unless you work hard.

=Unless you work hard, you will fail the exam.

{#blank#}1{#/blank#} {#blank#}2{#/blank#} think it over, you will find a way out.

Did you {#blank#}1{#/blank#} the dictionary {#blank#}2{#/blank#} our English teacher?

Sam asked{#blank#}1{#/blank#} Mr. Green{#blank#}2{#/blank#} decided on the date for the spring outing.