be afraid of [简明英汉词典]

v.害怕, 担忧

i am afraid of snake.我害怕蛇.

used to [简明英汉词典]

[5ju:s tE]

惯常, 惯于

We used to go there every year.

我每年都去那儿。

have to [简明英汉词典]

[have got to] 不得不, 只好

"'You'll have to get off here,' the conductor said."

"`你得在这里下车了,'售票员说。"

I have to go now.

我现在该走了。

worry about [简明英汉词典]

担心

i worry about my mother's health.