1/ they travel around the world (present simple)

they travelled around the world (past simple)

they will travel around the world (future simple)

they are travelling around the world (present continuous)

they were travelling around the world (past continuous)

they will be travelling around the world (future continuous)

they have travelled around the world (present perfect)

2/my brother takes my pen (present simple)

my brother took my pen  (past simple)

my brother will take my pen  (future simple)

my brother is taking my pen (present continuous)

my brother was taking my pen (past continuous)

my brother will be taking my pen (future continuous)

my brother has taken my pen (present perfect)