tom failed the english final?he was ten minutes late for the

tom failed the english final?he was ten minutes late for the final exam that's too bad
but he______ his roommate to wake him up.
should have asked would have asked must have asked may have asked
聊到那里投到那里 1年前 已收到3个回答 举报
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小陈翼德0066 春芽

共回答了21个问题采纳率：85.7% 举报

A 但是他应该让他的同为把他叫起来的
must have v-ed 表示推测过去某事“一定”发生了.
may / might have v-ed 表示推测过去某事“也许”发生了.may 比 might 表示的可能性在说话人看来稍大些.
ought to / should have v-ed 用于对已发生的情况表示“责备”、“不满”,表示“本应该…”

1年前

1

panmaker 幼苗

共回答了34个问题 举报

b it 作形式主语，that he failed the final exam. 做真正主语只有it 能够作形式主语 It is adj. that B. It it 作形式主语。真正

1年前

2

suhao265 幼苗

共回答了9个问题 举报

A 本应该做却没做，他本应该叫室友喊他起床的！

1年前

1
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