几次的用法和样例：
例句
-
他每年都要为商务到美国去几次。
He makes several business visits to American every year. -
昨天我给你打了几次电话，可是都没（和你）接通。
I tried ringing you several times yesterday but I couldn't get through (to you). -
那问题我给她解释了好几次，最後她才明白。
I had to explain the problem to her several times before the penny finally dropped. -
我摁了几次门铃，但没人应。
I rang the doorbell several times but couldn't make anyone hear.
