1) Did Sam begin to work last night? - Yes, he did./ No, he didn't.
What did Sam begin last night? - He began work.
When did Sam begin work? - Last night.
Who began work last night? - Sam did.
Sam began work last night, didn't he?/ Sam didn't begin work last night, did he?
2) Will child grow next year? - Yes, it will./ No, it won't.
What will child do next year? - It will grow.
When child will grow? - Next year.
Who will grow next year? - Child will.
The child will grow next year, won't it?/ The child won't grow next year, will it?