I need some help in determining where a main and auxiliary verb is in the below sentences. If someone can point me in the right direction I'd greatly appreciate it
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This group is
'have' as a main and aux verb
They
have decided to send a spaceship..
(as main verb?)
They
have done tests and know that plants can grow there
(as an aux verb?)
They
have not seen any alien life there
(as an aux verb?)
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The next group is
'be' as a main and auxiliary verb
No one else will
be able to join the space colony
The spaceship will
be controlled from Earth
(be as aux verb since will is a modal verb and controlled would be the main verb?)
They are very confident that human beings will
be able to live there
They have not seen any alien life there, but they cannot
be sure that it doesn't exist
(be as main verb?)