Английского

Let's agree to end this wait-and-see policy. Now don't let's be hearing any more of this. Let him repeat the accusation in Tim's presence. Let our military forces be capable and ready. Let me try to convince them myself.
All the three types of constructions are characterised by a high frequency occurrence, by uniformity of structure, by regularity of correspondence to the "pure", native morphemic spective form of the verb. For that matter, taken as a whole, they are more universal stylistically than the pure spective form, in so far as they are less bound by conventions of usage and have a wider range of expressive connotations of various kinds. These qualities show that the described constructions may safely be identified as functional equivalents of the pure spective mood. Since they specialise, within the general spective mood meaning, in semantic destination, the specialisation being determined by the semantic type of their modal markers, we propose to unite them under the tentative heading of the "modal" spective mood forms, or, by way of the usual working contraction, the modal spective mood, as contrasted against the "pure" spective expressed by native morphemic means (morphemic zeroing).
The functional varieties of the modal spective, i.e. its specialised forms, as is evident from the given examples, should be classed as, first, the "desiderative" series (may-spective, the form of desire); second, the "considerative" series (should-spective, the form of considerations); third, the "imperative" series (let-spective, the form of commands).
We must stress that by terming the spective constructional forms "modal" we don't mean to bring down their grammatical value. Modality is part and parcel of predication, and the modern paradigmatic interpretation of syntactic constructions has demonstrated that all the combinations of modal verbs as such constitute grammatical means of sentence-forming. On the other hand, the relevance of medial morpho-syntactic factor in the structure of the forms in question can't be altogether excluded from the final estimation of their status. The whole system of the English subjunctive mood is far from stabilised, it is just in the making, and all that we can say about the analysed spective forms
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in this connection is that they tend to quickly develop into rigidly "formalised" features of morphology.
Very important for confirming the categorial nature of the modal spective forms is the way they express the timing of the process. The verbal time proper is neutralised with these forms and, considering their relation to the present-order pure spective, they can also be classed as "present" in this sense. As to the actual expression of time, it is rendered relatively, by means of the aspective category of retrospective coordination: the imperfect denotes the relative present (simultaneity and posteriority), while the perfect denotes the relative past (priority in the present and the past). This regularity, common for all the system of the subjunctive mood, is not always clearly seen in the constructions of the spective taken by themselves (i.e. without a comparison with the subjunctive of the past order, which is to be considered further) due to the functional destination of this mood.
The perfect is hardly ever used with the pure spective non-imperative. As far as the imperative is concerned, the natural time-aspect plane is here the present-oriented imperfect strictly relative to the moment of speech, since, by definition, the imperative is addressed to the listener. The occasional perfect with the imperative gives accent to the idea of some time-limit being transgressed, or stresses an urge to fulfil the action in its entirety. Cf.:
Try and have done, it's not so difficult as it seems. Let's have finished with the whole affair!
Still, when it is justified by the context, the regularity of expressing time through aspect is displayed by the specialised modal spective with the proper distinctness. Cf.:
I wish her plans might succeed (the present simultaneity
— posteriority). I wished her plans might succeed (the
past simultaneity — posteriority). I wish her plans might