句中的should have asked是"情态动词＋现在完成时"，表示过去本应该做某事，事实上没有做。

如：She {#blank#}1{#/blank#} Beijing. 她本应该去了北京。(没有去)

{#blank#}1{#/blank#} {#blank#}2{#/blank#} {#blank#}3{#/blank#} he isn't at school now.

Mr. Wang often {#blank#}1{#/blank#}us {#blank#}2{#/blank#} {#blank#}3{#/blank#} {#blank#}4{#/blank#} {#blank#}5{#/blank#} in strange clothes.

{#blank#}1{#/blank#} {#blank#}2{#/blank#}they{#blank#}3{#/blank#}“apple”?

John likes to{#blank#}1{#/blank#} {#blank#}2{#/blank#}and sports shoes.