sentence lo verb unta do/does vastundhi. verb lekapotha is/am/are vastundhi. example: 1.what is your name. indhulo verb ledhu andhuku 'is' vastundhi. 2.what does she eat. indhulo verb vachi eat so does vachindhi

EX:they are Indian.in this example we are not use 's' in the word indian

sir is this in past perfect tense

there is no difference between these(in meaning)but 1st sentence is correct because we use do/does when the sentence has verb.here we have a verb"like".

yes ,after "to" we use only infinitive verb means unchanged verb

"because" indicates the reason. ex:I don't go to school because iam not interested. "so" indicates the result. ex:I work hard so I got promotion.