PETS－2语法讲解(32)
'不定式的特殊句型too…to… 1）too…to 太…以至于…He is too excited to speak.他太激动了，说不出话来。---- Can I help you ? 需要我帮忙吗?---- Well, I'm afraid the box is too heavy for you to carr...'
PETS－2语法讲解(23)
'go on doing/to do go on to do 做了一件事后，接着做另一件事。go on doing 继续做原来做的事。 After he had finished his math，he went on to do his physics.做完数学后，他接着去做物理。 Go on doin...'
PETS－2语法讲解(13)
'used to/be used to used to + do："过去常常"表示过去习惯性的动作或状态，但如今已不存在。Mother used not to be so forgetful.Scarf used to take a walk.(过去常常散步)be used to + doing：对……已感到...'
