如题所述
keep因为是一个系动词,所以后面一般都只用ing形式,省略了on,完整的是keep on doing,不会有to do的形式,如果又,只有下面2种情况:
1.be kept to do.被动语态中后面用不定式,表目的.
e.g. his salary has been kept to afford their new car.
他把工资留着去买新车.
2.keep 和 to do属于两个部分的成分
e.g. you should keep slim to make yourself a good madel.
你应该保持身材才能做一个优秀的模特.
1.be kept to do.被动语态中后面用不定式,表目的.
e.g. his salary has been kept to afford their new car.
他把工资留着去买新车.
2.keep 和 to do属于两个部分的成分
e.g. you should keep slim to make yourself a good madel.
你应该保持身材才能做一个优秀的模特.
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