when I opened the window,I hearsome birds_________in the tree A.to sing B.singing C.sang D.sing
when I opened the window,I hearsome birds_________in the tree A.to sing B.singing C.sang D.sing
為什么選B.這是過去時而b是進(jìn)行時啊
為什么選B.這是過去時而b是進(jìn)行時啊
英語人氣:182 ℃時間:2020-04-06 08:45:56
優(yōu)質(zhì)解答
固定搭配:hear sth do/doing ①如果是聽見了整個過程則用do(動詞原形)②如果是聽見某人正在做則使用doing(動詞ing形式)這里是指當(dāng)我打開窗時,我聽見鳥兒正在唱歌,前面有when(當(dāng).時)所以肯定是正在做,所以用do...
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