好像你给的题目有点小错误,now后边应该是句号吧,没有连词时不可以直接逗号后面加一个句子.当然要是从句也可以,或者是独立主格,或者是分词作状语.
另外,你用办公软件打英文时也会发现,标点符号后面应该有个空格,否则会出现红色波浪线.
I have the（ability）to drive a car now.It also means I am (able) to drive now,but I was to drive a car when I was five years old.
翻译：我现在会开车了,也就是说我现在可以驾驶了,但是我5岁时就想要开车了
ability n,能力 able adj.有能力的还有一空 but I was？ to drive a car when I was five years old.but I was able to drive a car when I was five years old.be able to但是你还是再看一下题目吧，原来你给的题那里没空所以刚才翻译成了“就想要”了