The "D" versions of these words are contractions indicating that these words joined other word (that is this case is the preposition "de").
The preposition "de" means "of"/"from" in English and, among others, "de" can be used in combination with demonstrative pronouns. Here are some examples:
de + este = deste
de + estes = destes
de + isto = disto
de + esse = desse
de + isso = disso
de + aquele = daquele
Example of phrases:
- Quanto custa o aluguel desta casa? (de + esta = desta)
- Coloque tudo dentro desse recipiente que está perto de você. (de + esse = desse)
In this link you can see a list of common prepositions and their contractions:
February 16, 2016
In that case "D" is a contraction of the preposition "de" (of, from). If I say" eu me lembro disso", disso = de+isso. This site provides further explanation, concerning other types of contraction like "neste"= em+este. http://www.normaculta.com.br/pronomes-demonstrativos/
February 15, 2016
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