5. Because I forgot to electricize my mobile telephone yesterday, when I woke up it closed.
我昨天忘记给手机充电了，今早醒来发现手机关机了。
还能这样说：
My phone had run out of power for I forgot to charge up the battery.
My battery was dead when I roused up from sleep.
应用解析：
forget oneself in 沉浸于……
forget to 忘了要……
forget flagrantly 公然忽视；
forget wantonly 不负责任地忽略
6. His phone is powered off.
他的电话关机了。
还能这样说：
His phone turns off automatically.
His phone goes dead now.
应用解析：
be beyond one's powers 不能胜任，力所不及；
come to power 掌权，上台；
do all in one's power 尽力，竭尽全力
7. The subscriber I just dialed is power off.
我刚刚拨打的电话关机了。
还能这样说：
The phone I just dialed has logged off.
The phone I called a moment ago shuts down.
应用解析：
ten percent off 九折；
drink off 喝完；
leave off work 停止工作；
pay off 付清；
get off 脱衣，下马；
fall off 从……掉下来；
look off 掉转视线
8. Could I use your phone? Mine is power off.
我能用一下你的手机吗？我的没电了。
还能这样说：
Would you mind me using your cell phone?
Are you so kind to lend your phone to me?
谚语：
Use is a second nature.
习惯成自然。