Question

When 和While在过去进行时里怎么用

Answer 1

when+过去式 瞬间性动词。while+过去进行时 延续性动词
When后面接一般式 Whlie后面接进行式

Answer 2

His mother was softly pacing on the lawn outside, while little Laura was lookingat the sunset.
他的母亲在外面的草坪上悠闲地散步，小劳拉则在观看夕阳。
He tripped when he was trying to spell the word "through" .
他在拼写“through”这个词的时候拼写错了。