1.美国人用forever,英国人用for ever.两国都认为对方的用法是错误的.
UK writers most often use the two-word phrase “for ever,” whereas Americans strongly prefer the one-word form “forever.” Each nationality is liable to think the other is making a mistake.
2.另外,forever可用于句中和句尾.for ever只能用于句尾.放在句尾就混用吧.