clamber的现在进行时怎么写？

vi.（吃力地）攀登，攀爬n.困难的或麻烦的攀登...

clamber的第三人称单数（三单）为：clambers...

clamber的音标：clamber的英式发音音标为：['klæmbə(r)]clamber的美式发音音标为：['klæmbɚ, 'klæmɚ]...

clamber的现在完成时为：clambered...

He was too out of condition to clamber over the top.他体质太差，爬不到山顶。Sailor as he was, it was easy enough for him to clamber up the gnarled trunk.他虽说是个水手,攀上这扭曲的树干, 倒还容易.Teenage boys clamber down mine shafts 30 to 50 meters de...

clamber的一般过去时为：clambered...