I teach him English.

I teaching him English.

I am teaching him English.

Are these sentences above grammatically correct?

  • 1
    MartinW is correct. But I just want to add a little bit, the second example is ungrammatical because a progressive aspect should be marked by a form of BE. "I am teaching.." – user178049 May 7 '17 at 8:10
  • In these sentences, teaching, is an active/present participle, not a gerund. An example of a gerund would be teaching is fun. – JavaLatte May 7 '17 at 16:12

The first one is Present Simple. It's used for routines, schedules, general truths, etc. in the present; and for scheduled future events.

I teach him English every day.

Water boils at 100 degrees Celsius.

The train departs at 11:30 p.m.

The second one is not correct.

The third one is Present Continuous. It's used for things happening now.

I am now teaching him English.

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