Questions & Answers about Ég þræddi nálina í gær.
- Ég = I, the subject
- þræddi = the verb, past tense, threaded
- nálina = the direct object, the needle
- í gær = a time expression, yesterday
So the structure is:
subject + verb + object + time expression
The dictionary form is þræða, which means to thread.
In this sentence, þræddi is the past tense form. A learner will often want to memorize it like this:
- að þræða = to thread
- ég þræddi = I threaded
Because þræða is a weak verb, and its past tense is formed with -ði / -di / -ti depending on the verb.
For þræða, the past tense stem becomes:
- þræða → þræddi
This kind of consonant change is normal in Icelandic verb forms and is something you usually learn together with the verb rather than trying to predict perfectly every time.