之前现在对比英文

I am changed a lot in the last few years . 开头用这个比较好

Two years ago, I was a very naughty and intractable girl. I hated going to school and doing homework, I hated all the teachers. But then somebody came into my life, Mr. Green, my English teacher. He taught me so patiently and showed me how interesting study was. Now I love study and I am good at English. I can even deliver a speech in English! My parents are so proud of me and I just find out that is so amazing to be a good child. I feel so lucky I met Mr. Green. Thank you.

my name is Liu Hui , now I'm in grade 9 .when I was in grade5, I was a introversion person , but now , and afraid of learning ,my English was very bad ,I afraid of ererything ,I afraid of being asked to answer the teacher's questions . but now I change a lot , I get on well with my classmates , what's more , I don't afraid of being questioned now . and my interest of learning English is increase.

如下：

1. I used to get up late, but now I get up early.

2. He used to smoke , but now he has stopped smoking.

3. Tom used to be careless, but now he is careful.

4. She used to go to school by bike, but now she goes to school on foot.

5. She used to do nothing for her mother, but now she often helps her mother to do housework.

6. He used to be a worker, but now he is a teacher.

翻译：

1.我过去常常起得晚，但现在我起得早。

2.他过去抽烟，但现在已经戒烟了。

3.汤姆过去很粗心，但现在他很小心。

4.她过去骑自行车去上学，但现在她步行去上学。

5.她过去什么都不帮妈妈做，但现在她经常帮妈妈做家务。

6.他过去是一名工人，但现在是一名教师。

前后对比分析法在战略环境评价中应用初探

Application of before and after comparison methods to strategic environmental assessment

运用微探头超声检查食管下段静脉结构的情况，进行治疗前后对比研究。

Esophageal vascular structures were examined with miniature ultrasonic probe.

成年难治性癫痫患者生活质量手术前后对比分析

Quality of life with the affection of operation in adults with epilepsy