原形 过去式 过去分词
baby-sit临时照顾 baby-sat baby-sat
be(am/is/are)是 was/were been
beat 击打 beat beaten
become 变成 became become
begin 开始 began begun
bend 使弯曲 bent bent
bet 赌 bet...
原形 过去式 过去分词
baby-sit临时照顾 baby-sat baby-sat
be(am/is/are)是 was/were been
beat 击打 beat beaten
become 变成 became become
begin 开始 began begun
bend 使弯曲 bent bent
bet 赌 bet...