DEFECTIVE STRONG VERBS
247. There are several verbs which are lacking in one or more
principal parts. They are as follows:--
PRESENT. PAST. | PRESENT. PAST.
|
may might | [ought] ought
can could | shall should
[must] must | will would
248. May is used as either indicative or subjunctive, as it has two
meanings. It is indicative when it expresses _permission_, or, as it
sometimes does, _ability_, like the word _can_: it is subjunctive when it expresses doubt as to the reality of an action, or when it
expresses wish, purpose, etc.
[Sidenote: _Indicative Use: Permission. Ability._]
If I _may_ lightly employ the Miltonic figure, "far off his
coming shines."--WINIER.
A stripling arm _might_ sway
A mass no host could raise.--SCOTT.
His superiority none _might_ question.--CHANNING.
[Sidenote: _Subjunctive use._]
In whatever manner the separate parts of a constitution _may_ be arranged, there is one general principle, etc.--PAINE.
[Sidenote: (_See also Sec. 223._)]
And from her fair and unpolluted flesh
_May_ violets spring!
--SHAKESPEARE.
249. Can is used in the indicative only. The _l_ in _could_ did
not belong there originally, but came through analogy with _should_
and _would_. _Could_ may be subjunctive, as in Sec. 220.
250. Must is historically a past-tense form, from the obsolete
verb _motan_, which survives in the sentence, "So _mote_ it be."
_Must_ is present or past tense, according to the infinitive used.
All _must concede_ to him a sublime power of action.--CHANNING
This, of course, _must have been_ an ocular
deception.--HAWTHORNE.
251. The same remarks apply to ought, which is historically the
past tense of the verb _owe_. Like _must_, it is used only in the
indicative mood; as,
The just imputations on our own faith _ought_ first _to be
removed_.... Have we valuable territories and important
posts...which _ought_ long since _to have been surrendered_?
--A. HAMILTON.
It will be noticed that all the other defective verbs take the pure
infinitive without _to_, while _ought_ always has _to_.
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