Jim gave me a letter to post. I . remember to post it.
must
can
needn’t
may

I must remember to post it.

ride - are riding

write - am writing

have - are having

run - is running

swim - am swimming

watch- is watching

help! help! he is not strong and not brave. his face is ugly. he has  got a white nose. he can't swim, sing and run. he lives in the field.