How do you make verbs a command?

Question

Like "Decir" in this sentence: Dime por qué las noches son tan largas.

Thanks

Answer 1

This is several chapters in a book.

Here are the lessons:

http://www.spanishdict.com/topics/show/65

http://www.spanishdict.com/topics/show/66

http://www.spanishdict.com/topics/show/67

http://www.spanishdict.com/topics/show/91

http://www.spanishdict.com/answers/100065/vosotros-commands#.VD7rJvldWX4

In the basic, learn 8 irregulars for positive tú commands (di is one of those- your example of dime), all others are 3rd person present indicative. Pronouns attached at the back end (dime, not me di)

Negative tú- no then present subjunctive, pronouns in front in the normal way- no me digas

Formal- use present subjunctive, pronouns attached after if positive, in front if negative.

Vosotros and nosotros I will leave for you to read.

Answer 2

This thread should be helpful.

Verb commands

using commands