He clean) his teeth every day. we play) snowballs last winter. tom get) a letter yesterday. read) a new book next week. i often to visit) my friend in moscow. helen usually to do) her homework at 7 pm. tomorrow my mother buy) a new dress. five months ago i swim) in the river. yesterday he be) at the zoo. next summer he be) at the zoo. now he be)at the zoo.

He cleans  his teeth every day.

We were playing snowballs last winter.

Tom got  a letter yesterday.

Mary is going to read a new book next week.

I often visit my friend in Moscow.

Helen usually does her homework at 7 pm.

Tomorrow my mother is going to buy a new dress.

Five months ago I was swimming in the river.

Yesterday he was at the zoo.

Next summer he  will be at the zoo.

Now he is at the zoo.