Appropriate Time of Greeting Good Evening To a large extent the start of 'evening' is a matter of opinion or convention The Oxford Dictionaries say that it 'usually' starts at 'about' 6 PM Note the lack of a definite rule Evening NOUN 1 The period of time at the end of the day, usually from about 6 p m to bedtime it was seven o'clock in the evening Evening (Lexico) Cambridge does not provide a time: the part of the day between
Will you work this evening? vs Will you be working this evening? Will you be working this evening? Example (3) is asking whether the OP is going to be spending their time working this evening Given the wording of the Original Poster's question, it seems that the most suitable form for their particular query would be (1) Notice that this is the form that the Original Poster actually used in their question:
What word do we use to mean evening breakfast? Usually we use the word "breakfast" in the morning to mean to eat something, but what word do we use to mean "afternoon breakfast" and "evening breakfast"?
word order - Tomorrow evening OR evening tomorrow OR - English Language . . . When you are more specific with the time- “tomorrow evening”, “Monday afternoon”, “February 15th”, etc- you would not use “in” or “the” “On” would be used for the latter 2 expressions Not sure if there’s a reason for this or if it’s just idiomatic
grammar - What are you doing going-to-do this evening? - English . . . What will you do this evening? But this doesn’t necessarily mean that the book is wrong; it may be that something in the instructions excludes constructions with BE going to from consideration in this particular question