I learned English long time ago. The native speaker teacher told me that we always use comma after the word then. However, one proofreader told me that I must not write a comma after then. I am really confuse. Could some one please explain to me when it is correct to use comma with then?
For example,
Then, the next step is estimating the model parameters.
Set
xas a first point, then, find the pointygivenx.
Best Answer
There are some circumstances that a comma should be used after then:
But your examples aren't such circumstances. When using then to indicate a sequence of events, either in reporting events or giving instructions, it should not normally have a comma (though there are always exceptions, like there being a parenthetical clause immediately after it). When used in a similar sense to therefore, it may or may not want a comma after it - to the same standards as if you were using the word therefore.