VOA慢速英语:Study Ties Some Pesticides to Risk of ADHD in Children

1.Adults can also have it. People with A.D.H.D. have problems with paying attention, controlling their behavior and being overly active.

have作为实意动词的的详细用法：

    1)表示“有”的意思。
    Look, I have wings, just like you.
He had fair hair and blue eyes.     其否定和疑问形式变化，在美国通常用助动词do。
    在英国口语中常用have got代替have.
    Look, can’t you see I've got teeth, too.
    I haven't got any jewelry.

    2)have和一些其他名词连用，表示：

    (1)一种活动。
    We have no classes on Sunday.（上课）
    they’re going to have a volleyball match.（举行比赛）
    Are we going to have a meeting this week?（开会）
    We are going to have a talk this afternoon.（听报告）
    (2)患病。
    I have got a headache.
    I have a bad cold.
    (3)发生的情况。
    I've had so many falls that I'm black and blue all over.（跌跤）
    (4)生育。
    The queen ant may have tens of thousands of babies in one summer.

    3)和一与动词同形的名词连用，表示一个动作（have＋a＋由动词转化和名词）。
    Are you going to have a swim.
    I have a long talk with the teacher.

    4)have on sth.或have sth. on，表示“穿着”、“戴着”(=to be wearing)。
    I noticed he had on bedroom slippers.
    At the ball Motile had a diamond necklace on.

    5)表示“吃”、“喝”。
    I wanted to have a cup of tea and some eggs.
    Does she have lunch at home?

    6)组成复合结构即“have＋宾语＋宾语补足语”。

    (1)不加to的动词不定式作宾语补足语(have sb. do sth.)，表示让、叫某人做某事。
    The soldier had him stand with his back to his father.(SBⅠL17)
    〔注〕：否定结构表示“不能让…”或“从未有人…”.
    We won't have you blame it on others.
    She had never had anybody speak to her that way before.
    (2)现在分词作宾语补足语(have sb.(sth.)doing)，表示让（使）某人做某事。
    …the two men had their lights burning all night long….
    (3)过去分词作宾语补足语(have sb. (sth.)done)，表示：
    ①使（让，请）别人作某事，表示的动作是别人做的。
    Emperor Qin Shi Huang had all the walls joined up.
    …he should have new clothes made of this splendid cloth for the coming great procession.
    ②遭遇到某事。
    Houses near airports sometimes have their windows broken.
    Workers in some industries have their hearing harmed by the noise of the machine.

2.The researchers tested all the children for products that break down from organophosphates.

break down分解;拆散; 分类

例句：Let's break down the project into smaller parts in order to deal with them one by one.
      我们把这个计划分成几个小项逐一进行。

3.The higher the level of pesticide residue in the urine, the higher the risk of A.D.H.D. in the children.

the+比较级, the+比较级：表示后者随着前者的变化而变化，意为“越……就越……”，前者相当于一个条件句，因此，要用一般现在时代替一般将来时。如：

The harder you work, the better result you’ll get.你学习越努力，成绩就越好。

4.Maryse Bouchard says the study found that exposure could play a part in behaviors such as inattention and hyperactivity.

play a part发挥作用

例句：In a singing play singing and acting play an important part.
      在文戏中唱和表演起很重要的作用。

5.Children come in contact with high levels of pesticides through farming.

come in contact with和...接触,接触到

例句：When did you first come in contact with him?
      你什么时候开始和他接触的？