The analytical forms of the Subjunctive Mood consist of the mood auxiliaries should, would, may (might) or shall (which is seldom used) and the infinitive of the notional verb.

Mr. Barkis… proposed that my pocket-handkerchief should be spread upon the horse’s back to dry. (Dickens)
Yates wished Bing would stop thanking him, but Bing went on. (Heym)
Whoever you may be, Sir, I am deeply grateful to you. (Dickens)
She lowered the blind and closed the shutters that he might not see the sun set. (Voynich)
I propose that you shall come along with me. (Dickens)

Mood auxiliaries have developed from modal verbs, which have lost their modality and serve to form the analytical Subjunctive. Still there are cases when mood auxiliaries retain a shade of modality, for instance the verb might in adverbial clauses of purpose.

Lizzie stood upon the causeway that her father might see her. (Dickens)

In modern English the same meaning as is expressed by the Subjunctive Mood may also be rendered by the forms of the Indicative Mood – the Past Indefinite, the Past Perfect and occasionally the Past Continuous and the Past Perfect Continuous.

In adverbial clauses of condition the Past Indefinite denotes an unreal condition referring to the present or future; the Past Perfect denotes an unreal condition referring to the past.

The room is so low that the head of the tallest of the visitors would touch the blackened ceiling if he stood upright. (Dickens)
The noise about her was frightful, so deafening that if she had shouted aloud she would not have heard her own voice. (Cronin)

In other types of subordinate clauses the Past Indefinite denotes an action simultaneous with the action expressed in the principal clause; the Past Perfect denotes an action prior to that of the principal clause.

He (Mr. Barkis) sat looking at the horse’s ears as if he saw something new there. (Dickens)
I felt as if the visit had diminished the separation between Ada and me.(Dickens)
The Past Continuous and the Past Perfect Continuous are less frequently used. They looked as if they were fighting for their life. (Eliot)
The mother’s delicate eyelids were pink, as if she had been crying half the night. (Eliot)