should 应该 （shouldn’t=should不应该 ） What does the sign mean?

No smoking (严禁吸烟) : It means you shouldn’t smoke here. smoke 吸烟

No littering （严禁乱丢杂物）: It means you shouldn’t litter here. litter 乱丢杂物

No parking （禁止停放车辆）: It means you shouldn’t park here. park 停车

No eating or drinking （禁止吃喝）: It means you shouldn’t eat or drink here.

No + V-ing: No taking photos 禁止拍照 No swimming 禁止游泳

Danger （危险）: It means you should stay away from it. stay away from 远离（不靠近）

Do not touch （严禁触碰）: It means you shouldn’t touch it. touch 触，碰

Keep off the grass （不接近草坪）: It means you shouldn’t walk on the grass. Keep off 不接近

Be quiet （保持安静）: It means you shouldn’t make noise. Make noise 发出噪音（声响） 二、部分语言点札记

1 always 总是 always > usually > often > sometimes This boy is always late for school. 这个男孩总是上学迟到。 I always take a walk after supper. 我晚饭后总是散散步。 Does he always have so many questions? 他总有那么多问题吗？ 2 情态动词：在英文中主要用来表示说话人的看法，态度等，有以下特点： 本身都有一定意义； 不能单独作谓语；在句中不受任何人称，数的变化的影响，目前我们学过的这些情态动词后跟的动词一般都是改词原形

目前学过的一些情态动词及用法:

(1) can (否定 cannot=can’t) 能

① 表示具备的能力（体力，脑力）：

A bird can fly, but a man can’t. // Can you play the violin? ② 表示允许

Can I have a look? // Can I ask some questions? // You can go now.