[Grammar] I plan going on a picnic.

[wotcha]

Most of grammar books indicate that verb 'plan' agrees with

to infinitive but my dictionary says 'plan + gerund' is also grammatical.



I don't know what to tell to my students.

Will it be ok if I say 'plan' can be followed both infinitive and gerund ?

 

[Raymott]

Most of grammar book indicate that verb 'plan' agrees with

to infinitive but my dictionary says 'plan + gerund' is also grammatical.



I don't know what to tell my students.

Will it be ok if I say 'plan' can be followed by [STRIKE]both[/STRIKE] either infinitive [STRIKE]and[/STRIKE] or gerund ?

It can be followed by either, but not both.
However, the gerund is not common by itself. You can say, "I plan on going on a picnic"; "Do you plan on staying long?" etc.