alternate的现在进行时怎么写？

The three acts will alternate as headliners throughout the tour...这3个节目将在整个巡回演出中轮流打头牌。Convolutions frequently alternate in direction of rotation and vary in pitch.盘旋经常改变回转方向和节距.His group was forced to turn back and take ...

adj.轮流的，交替的，间隔的，代替的vi.交替，轮流vt.使交替，使轮流n.〈美〉（委员）代理人，候补者，替换物...

alternate的一般过去时为：alternated...

alternate的音标：alternate的英式发音音标为：[ɔ:l'tɜ:nət]alternate的美式发音音标为：['ɔltərnət]...

alternate的现在完成时为：alternated...

alternate的第三人称单数（三单）为：alternates...