新增语法项目:if 和 when 的从句目前进行时用于将要发生的事过去进行时与本级语言功能有关的情态单词，如：must， have to， need to, might用于表达目的的不定式化 （ to do… ）式语法解析 1。 If ,when 引导的条件句--—第一条件句 If 引导的条件句:if 意为"假如" If I am better tomorrow, I will get up。 If I have a headache, I will take an aspirin。If she finishes early， she will go home。 If it rains tomorrow, I'll go to school by bus。If it rains tomorrow， they won't go outside to play。when 引导的条件句，在此级别中意为”要是，在…之后"My mother came back when she finished her work。I will work in the garden when it stops raining。 2. 过去进行时 形式： 过去进行时由 was/were —ing 分词构成. I was writing。 We were writing. 使用方法: ①表达过去某时正在进行的动作。 What were you doing last night at seven o’clock？ Workers were building a dam last summer. ②与 always 连用表达过去常常反复的动作。 He was always changing his mind。She was always coming back late.3. 目前进行时用于将要发生的事目前进行时可以表达正在发生的事情The boys are playing football。那些男孩正在踢足球。还可以表达未来时They’re leaving tomorrow. 他们明天走 。4. 情态动词有 can （could）, may (might）， must, have to， shall (should, will （would）， dare (dared）, need （needed）， ought to 等. 直接加动词原形一、 can， could 1) 表达能力（体力、知识、技能）。 Can you lift this heavy box？（体力） 2) 表达祈求和容许。 ——-——Can I go now？ --—-- Yes， you can。 / No， you can't。 二、 may1) 表达祈求和容许.—--— May I smoke in this room? 三、 must， have to 1） 表达必须、必要。 You must come in time。 2） must 是说话人的主观见解, 而 have to 则强调客观需要。1． He play isn't interesting， I really must go now。 2． I had to work when I was your age. 四、 need 1） need do sth。...
