后的不定式有时用进行式的英文

had better

• 后:    behind; back; rear
• 的:    4次方是 The fourth po ...
• 不定式:    indeterminate form ...
• 有时:    sometimes; at time ...
• 用:    40分钟跑完全程 run the c ...
• 进行:    be in progress; be ...
• 式:    type; style