Paying over the Internet isn't always safe.这句话Pay为什么变成ing形式?

Paying over the Internet isn't always safe.这句话Pay为什么变成ing形式? the duty paying value Paying over the Internet isn't always safe.这句话对吗?如果对,pay为什么变成ing形式 Paying the cost的意思 英语翻译Helicopter parents hover over their children,managing every aspect of their child’s life.On the contrary,submarine parents remain “hidden” coming to the surface when guidance is needed.While helicopter parents may have the best inte Many people are surprised when they find out the inte... It is said john will be in a job paying over 800 dollars -----year He also get paid by -------weekIt is said john will be in a job paying over 800 dollars -----yearRight .he will also get paid by -------weekA the the B a the C the a D a a The effort is paying off怎么翻译? paying the piper 具体句子：.....and now am paying the piper trying to get caught up... .out of the shop without paying.这句话中paying是什么用法,为什么要加ing the woman took away a dress with out(paying)for it.为什么要用paying? 英语翻译Students enrolled at least half time may borrow up to $3,000 form the government over a two-year period.Repayment of the loan begins six months after the student leaves school.These loans carry on interest until this time.The current inte 填入适当介词或副词1Farmers pick apples several months_____2.He tries his hat____3.Well have our summer holiday ____ three months.Paying over the Internet isn't always safe(改同义句） over the over the Over the over the over the