Oi kui tore.

Passive Modal Perfect Continuous
The room should have been being cleaned but nobody was there.

Huvitav, palju nad seda vormi reaalselt ise kasutavad?! Õud, mul on kõik sassis ja ma tunnen end lollimana kui enne kooli :S

"Can" is one of the most commonly used modal verbs in English. It can be used to express ability or opportunity, to request or offer permission, and to show possibility or impossibility.

"Could" is used to express possibility or past ability as well as to make suggestions and requests. "Could" is also commonly used in conditional sentences as the conditional form of "can."

"Had better" is most commonly used to make recommendations. It can also be used to express desperate hope as well as warn people.

"Have to" is used to express certainty, necessity, and obligation.

"May" is most commonly used to express possibility. It can also be used to give or request permission, although this usage is becoming less common.

"Might" is most commonly used to express possibility. It is also often used in conditional

"Must" is most commonly used to express certainty. It can also be used to express necessity or strong recommendation, although native speakers prefer the more flexible form "have to." "Must not" can be used to prohibit actions, but this sounds very severe; speakers prefer to use softer modal verbs such as "should not" or "ought not" to dissuade rather than prohibit.

"Ought to" is used to advise or make recommendations. "Ought to" also expresses assumption or expectation as well as strong probability, often with the idea that something is deserved. "Ought not" (without "to") is used to advise against doing something, although Americans prefer the less formal forms "should not" or "had better not."

"Shall" is used to indicate future action. It is most commonly used in sentences with "I" or "we," and is often found in suggestions, such as "Shall we go?" "Shall" is also frequently used in promises or voluntary actions. In formal English, the use of "shall" to describe future events often expresses inevitability or predestination. "Shall" is much more commonly heard in British English than in American English; Americans prefer to use other forms, although they do sometimes use "shall" in suggestions or formalized language.

"Should" is most commonly used to make recommendations or give advice. It can also be used to express obligation as well as expectation.

"Will" is used with promises or voluntary actions that take place in the future. "Will" can also be used to make predictions about the future.

"Would" is most commonly used to create conditional verb forms. It also serves as the past form of the modal verb "will." Additionally, "would" can indicate repetition in the past. sentences. English speakers can also use "might" to make suggestions or requests, although this is less common in American English.

Ok, siiani on veel loogiline. Nii. Harjutad ja sujub :P aga siis hakkavad nad neid käänama ja pöörama. Minevikku, kestvasse, tulevikku, eitusesse, passiivi... ja lõpuks pannakse nood kõik ühte harjutusse kokku. Nii tore :).