asphyxiate的现在完成时怎么写

We must trace the source of these noxious gases before they asphyxiate us.在我们被这些有毒气体窒息之前,必须查出其来源....

asphyxiate的音标：asphyxiate的英式发音音标为：[əs'fɪksieɪt]asphyxiate的美式发音音标为：[æs'fɪksiˌet]...

asphyxiate的第三人称单数（三单）为：asphyxiates...

asphyxiate的一般过去时为：asphyxiated...

vt.使窒息vi.窒息...

asphyxiate的现在进行时为：asphyxiating...