open the brackets put the verbs into the present indefinite the

The pupils write down their homework every lesson. (Употребили Present Indefinite т.к. every lesson).

The pupils are writing down their homework now. ( Употребили Present Continuous т.к. now).

The pupils wrote down their homework five minutes ago. ( Употребили Past Indefinite т.к. ago).

My uncle travels around the USA every year. (Употребили Present Indefinite т.к. every year).

My uncle is traveling around the USA now. ( Употребили Present Continuous т.к. now).

My uncle travelled around the USA last month. ( Употребили Past Indefinite т.к. last month).