1．英语中有些及物动词后面的宾语只能用v.ing形式，常见动词有： enjoy, finish, avoid, admit, practise, consider, imagine(想象), keep, advise, suggest, appreciate, allow, permit, forbid, mind(介意), miss(错过), excuse(原谅), risk(冒险), escape等。
I first considered writing to her but then decided to see her.我起先考虑写信给她，但后来决定去看她。
It is very important that we should practise speaking English every day.
我们每天练习说英语是很重要的。
[名师点津]
advise, allow, permit, forbid等词后直接接v.ing形式作宾语， 如果后面有名词、 代词作宾语， 则其后用不定式作宾语补足语。即：
allow/advise/forbid/permit
Teachers don't allow speaking loudly in class.
老师不允许在课堂上大声说话。
Teachers don't allow us to speak loudly in class.
老师不允许我们在课堂上大声说话。
