Mustaqil ishlar ro’yhati

Dare and need [edit]
The verbs dare and need can be used both as modals and as ordinary conjugated (non-modal) verbs. As non-modal verbs they can take a to-infinitive as their complement (I dared to answer her; He needs to clean that), although dare may also take a bare infinitive (He didn't dare go). In their uses as modals they govern a bare infinitive, and are usually restricted to questions and negative sentences.
Examples of the modal use of dare, followed by equivalents using non-modal dare, where appropriate:

• 
  Dare he do it? ("Does he dare to do it?")
  
• 
  I daren't (or dare not or dosn't) try. ("I don't dare to try")
  
• 
  How dare you! (idiomatic expression of outrage)
  
• 
  I dare say. (another idiomatic expression, here exceptionally without negation or question syntax)
  

The modal use of need is close in meaning to must expressing necessity or obligation. The negated form need not (needn't) differs in meaning from must not, however; it expresses lack of necessity, whereas must not expresses prohibition. Examples:

• 
  Need I continue? ("Do I need to continue? Must I continue?")
  
• 
  You needn't water the grass ("You don't have to water the grass"; compare the different meaning of You mustn't water...)
  

Modal need can also be used with the perfect infinitive: Need I have done that? It is most commonly used here in the negative, to denote that something that was done was (from the present perspective) not in fact necessary: You needn't have left that tip.
Used to[edit]
See also: English markers of habitual aspect
The verbal expression used to expresses past states or past habitual actions, usually with the implication that they are no longer so. It is followed by the infinitive (that is, the full expression consists of the verb used plus the to-infinitive). Thus the statement I used to go to college means that the speaker formerly habitually went to college, and normally implies that this is no longer the case.
While used to does not express modality, it has some similarities with modal auxiliaries in that it is invariant and defective in form and can follow auxiliary-verb syntax: it is possible to form questions like Used he to come here? and negatives like He used not (rarely usedn't) to come here.^{[citation needed]} More common, however, (though not the most formal style) is the syntax that treats used as a past tense of an ordinary verb, and forms questions and negatives using did: Did he use(d) to come here? He didn't use(d) to come here.^[a]
Note the difference in pronunciation between the ordinary verb use /juːz/ and its past form used /juːzd/ (as in scissors are used to cut paper), and the verb forms described here: /juːst/.
The verbal use of used to should not be confused with the adjectival use of the same expression, meaning "familiar with", as in I am used to this, we must get used to the cold. When the adjectival form is followed by a verb, the gerund is used: I am used to going to college in the mornings.
Deduction[edit]
Main article: English modals of deduction
In English, modal verbs as must, have to, have got to, can't and couldn't are used to express deduction and contention. These modal verbs state how sure the speaker is about something.^[15][16][17]

• 
  You're shivering—you must be cold.
  
• 
  Someone must have taken the key: it is not here.
  
• 
  I didn't order ten books. This has to be a mistake.
  
• 
  These aren't mine—they've got to be yours.
  
• 
  It can't be a burglar. All the doors and windows are locked.
  

Double modals[edit]
In formal standard English usage, since modals are followed by a base verb, which modals are not, modal verbs cannot be used consecutively. That requirement then dictates they can be followed by only non-modal verbs. Might have to is acceptable ("have to" is not a modal verb), but *might must is not, even though must and have to can normally be used interchangeably.^{[citation needed]} Two rules from different grammatical models supposedly disallow the construction. Proponents of Phrase structure grammar see the surface clause as allowing only one modal verb, while main verb analysis would dictate that modal verbs occur in finite forms.^[18]
A greater variety of double modals appears in some regional dialects. In English, for example, phrases such as would dare to and should have to are sometimes used in conversation and are grammatically correct. The double modal may sometimes be in the future tense, as in We must be able to work with must being the main auxiliary and be able to as the infinitive. Other examples include You may not dare to run or I would need to have help.
To put double modals in past tense, only the first modal is changed as in I could ought to. Double modals are also referred to as multiple modals.^[19]
To form questions, the subject and the first verb are swapped if the verb requires no do-support, such as Will you be able to write? If the main auxiliary requires do-support, the appropriate form of to do is added to the beginning, as in Did he use to need to fight? If modals are put in the perfect tense, the past participle of the infinitive is used, as in He had been going to swim or You have not been able to skate. In questions, the main verb and subject are swapped, as in Has she had to come?
"I might could do something," for instance, is an example of a double modal construction that can be found in varieties of Southern American and Midland American English.^[18]

2. 
   Multimedia hardware. 2. Multimedia apparat vositalari.