情态动词疑问She __ be ill because I saw her playing tennis just no
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情态动词疑问
She __ be ill because I saw her playing tennis just now.
A.can't B.couldn't C.mustn't D.may not
为什么选A?because后半句是过去时态,前面为什么不用C?
saw her playing这是什么时态?
雪的凝诺 说can't be 是否定句中的表猜测,那么为什么本题不选B呢?because后半句都用了过去时,那么怎么就选择它的前半句用一般现在时呢?
She __ be ill because I saw her playing tennis just now.
A.can't B.couldn't C.mustn't D.may not
为什么选A?because后半句是过去时态,前面为什么不用C?
saw her playing这是什么时态?
雪的凝诺 说can't be 是否定句中的表猜测,那么为什么本题不选B呢?because后半句都用了过去时,那么怎么就选择它的前半句用一般现在时呢?
1.mustn't 是不准的意思,而can't be 是否定句中的表猜测,意思为不可能,肯定句表猜测是must be ,意思为一定是
2.这个短语的句型是see sb doing sth 是在那一刻某人正在干某事
而see sb do ,是看见某人干某事的全过程,比如 see the traffic accident happen
2.这个短语的句型是see sb doing sth 是在那一刻某人正在干某事
而see sb do ,是看见某人干某事的全过程,比如 see the traffic accident happen
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