You should not be sad. ☊ 
Bạn không nên buồn. ☊ Modal Verbs should not ☊ không nên ☊ Modal Verbs Buddhism or other religions should not be influenced by politics. ☊ Đạo Phật hay những tôn giáo khác không nên bị ảnh hưởng bởi chính trị. ☊ History like: không nên → →
one should not expect (something) ☊ ta không nên trông đợi ☊ never put off until tomorrow what you can do today ☊ việc có thể làm hôm nay không nên hoãn lại ngày mai ☊ 
Du solltest den Kredit aber nicht zu oft beanspruchen. ☊ Nhưng anh không nên quá thường xuyên lạm dụng cái thẻ tín dụng này. ☊ (Lektion 44, Nr. 638) Und außerdem sollst du nicht immer so viel fernsehen. ☊ Và thêm nữa anh không nên thường xuyên xem TiVi như thế. ☊ (Lektion 60, Nr. 851) Deine Schwester sollte kein Mitleid mit ihm haben und ihn endlich verlassen. ☊ Chị của em không nên khoan dung cho anh ta và dứt khoát rời bỏ. ☊ (Lektion 61, Nr. 865) Sie muss sich ja nicht unbedingt an ihm rächen, aber sie sollte sich in Zukunft wirklich nicht mehr ausnutzen lassen. ☊ Chị cũng không nhất thiết phải trả thù anh ta, nhưng thực sự trong tương lai chị không nên để bị lợi dụng nữa. ☊ (Lektion 61, Nr. 866) Das kann man einem Kind doch nicht vorlesen! ☊ Vậy truyện này người ta không nên đọc cho một đứa trẻ! ☊ (Lektion 71, Nr. 1022) I'd advise you not to tell him. ☊ advise ☊
You'd better not do that again. ☊ had better/best (do sth) ☊
She shouldn't be driving in her condition (= because she is pregnant). ☊ condition ☊
consult sb: You shouldn't have done it without consulting me. ☊ consult ☊
I shouldn't be too late. But it depends if the traffic's bad. ☊ that depends, it (all) depends ☊
Your age shouldn't make any difference to whether you get the job or not. ☊ make a, no, some, etc. difference (to/in sb/sth) ☊
force yourself: 'I shouldn't really have any more.' 'Go on—force yourself!' ☊ force ☊
it is forgotten that...: It should not be forgotten that people used to get much more exercise. ☊ forget ☊
You should not go out in the heat of the day (= at the hottest time). ☊ heat ☊
judge sb/sth (on sth): Schools should not be judged only on exam results. ☊ judge ☊
One should never criticize if one is not sure of one's facts. ☊ one ☊
He oughtn't to have been driving so fast. ☊ ought to ☊
We shouldn't blame ourselves for what happened. ☊ ourselves ☊
replace sb/sth with/by sb/sth: It is not a good idea to miss meals and replace them with snacks. ☊ replace ☊
risk doing sth: We've been advised not to risk travelling in these conditions. ☊ risk ☊
You shouldn't drink and drive. ☊ should ☊
A present for me? You shouldn't have! (= used to thank sb politely) ☊ should ☊
'Will it matter?' 'I shouldn't think so.' ☊ should ☊
You're not supposed to walk on the grass. ☊ not be supposed to do sth ☊
surprised (that...): You shouldn't be surprised (that) he didn't come. ☊ surprised ☊
The value of regular exercise should not be underestimated. ☊ value ☊
The doctor said he should not lift heavy weights. ☊ weight ☊
wrong that...: It is wrong that he should not be punished for what he did. ☊ wrong ☊