he was running as quickly as he could ________ (catch)the bus .该用哪种形式.
问题描述：
he was running as quickly as he could ________ (catch)the bus .该用哪种形式.
答
用不定式 to catch. 用to catch up with 也可以的
答
to catch
infinitive
答
用原形catch 情态动词could后面一定是接动词的原形
他尽可能的快跑追赶公车
答
你好, 用to catch.
你可以简化句子来看
he was running (as quickly as he could 尽可能快)________ (catch)the bus .
(as quickly as he could 尽可能快)去打掉，留下主干。
就是He was running quickly to catch the bus.