Present tenses

Present perfect is used to talk about...

• for something that started in the past and continues in the present

• habits or routines

• something important

Elisa ________ her homework now.

do / does are auxiliary verbs on...

• Present continuous

• Present perfect

• Present simple

We ​ (a)   been studying all day

• have
• has
• can
• do

auxiliary verb in the present continuous is.

• have

• to be

• do

They've ​ (a)   married for nearly fifty years

• been
• are
• got

Andy is tired because he _______ 7 days a week.

• work

• sleeps

• works

sometimes, never, hardly ever, usually, are time expressions for the

• present simple

• past

• future continuous

​ (a)   you ​ (b)   your dinner yet?

• have
• finished
• does
• finish
• are

for and since are used on ...

• present perfect

• present continuous

• present simple