用括号内所给单词的适当形式填空。
我必须要他戒烟。I must ask him to ______   _______ smoking.
你愿意来为我们加油吗？Would you like to come and _____ us _____  ?
我想请三天的假。I’d like to ask for ______   _____  leave.
我一到衡阳就给你打电I will call you _____  _______ as I come to Hengyang.
他们后天动身去北京They are _______ _______Beijing the day after tomorrow.