Theoretical Grammar The subject-matter of theoretical grammar. Its relation to practical grammar

-an -(e)de - ed Class2 - It’s a productive class. It’s formed from nouns and adjectives with the help of the suffix –ian (intitially –oja):Mete (n) (MnE meat) – metian (v) (MnE to feed) As a result the forms of the Past Tense and Participle II had o before the dental suffix:Macian – macode – macod (MnE to make)
Infinitive Past Tense Participle II
-ian -ode -od
Class3 - In this class of weak verbs the suffix –j is present in the forms of the Infinitive and the Present Tense and is absent in the forms of the Past Tense and Participle II. This caused the umlaut and the doubling of the final consonant in the Infinitive and the Present Tense and the absence of these processes in the Past Tense and Participle II. The dental suffix is added without an intermediate element:Sec3an – sae3de – sae3d (MnE to say)The verbs of this class weren’t formed according to one common principle.
Infinitive Past Tense Participle II
-an -de -d
The Categories of the OE Verb
Tense. There were only two tenses in Old English: Present and Past. Future was expressed by lexical means. Aspect. Some verbs had the prefix 3e- which showed that the action was completed. Some scholars consider this prefix to be the mark of the completed aspect, but most scholars deny the existence of the aspect as a category. Mood. There were 3 moods: the Indicative, the Imperative and the Subjunctive.

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  The Indicative mood expressed the objective facts.
  
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  The Imperative mood expressed commands, requests, permission.
  
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  The Subjunctive mood expressed the suppositional, desirable, conditional, unreal action.
  

Voice. This category didn’t exist in Old English.
Person and Number. These categories had a well-developed system of forms which was represented in the system of conjugation of the verb. All the categories were expressed synthetically. But there were also some analytical formations in Old English.

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