Question

coloca cada verbo en presente continuo y pasado continuo
1._________ ____________withmy family (camp)
tom_______ ___________ in the sea (swin)
The boys_______ a lot of fruits at the market (shop)
you____ __________romantic letters (write)
he____ _________on holiday (sky)
↓↓↓↓↓↓↓↓↓↓↓↓↓↓↓
→por favor ayúdenme←
↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑

Answer 1

Present continuous
--Structure--
Subject + Verb to be + vern ing

Past continuous
--Structure--
Subject + was/were + verb ing

1. I am camping with my family (at the moment*)(camp)
tom is swimming in the sea (now*)(swin) <<< Swim
The boys buying a lot of fruits at the market (in the morning*)(shop) <<<buy is the best
you was writing romantic letters (testerday*) (write)
he was sking (last*) holiday (sky=cielo) ski is the word

The words in brackets (Time expresion*) 

the time expresion is necesary because you can identify the time (present or past)