She is screaming because she is really scared. /'skrimɪŋ/
Something is chasing her, so she is screaming for help.
(scream for help:大声呼救)
scream:高分贝尖叫 VS shout：大声喊
He's shouting because he is angry.
When he's really angry he often shouts like this.
She's sleeping because she's tired.
Last night she didn't get enough sleep, so today she has no energy.
（eg: I didn't get enough last night.我昨晚没睡饱）
She's crying because she's sad.
She got some bad news a few minutes ago.
(a few: 一些，几个，修饰可数名词)
She's smiling because she's happy.
Her boyfriend just called and he is returning from a long trip.
（return from...: 从哪里返回）
a long trip:漫长的旅程
她尖叫是因为她真的很害怕。
有什么东西在追她，所以她大声呼救。
他因为生气而大喊大叫。
当他真的生气时，他经常这样大喊大叫。
她睡着了，因为她累了。
昨天晚上她没有足够的睡眠，所以今天她没有精力。
她哭是因为她很伤心。
几分钟前她听到了一些坏消息。
她笑是因为她很开心。
她男朋友刚来电话，他刚从长途旅行回来。
