A fell ,was riding
固定句型 主語+ 一般過去時+when /while + 過去進行時, 表示一個動作伴隨另一個動作進行
hurt himself 是與fell 并列作主句的謂語
My brother __ down while he __ his bicycle and hurt himself.
My brother __ down while he __ his bicycle and hurt himself.
A fell ,was riding B fell ,were riding
C had fallen ,rode D had fallen ,was riding
A fell ,was riding B fell ,were riding
C had fallen ,rode D had fallen ,was riding
英語人氣：316 ℃時間：2020-01-26 03:31:11
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