If he were someone who was an assistant, with an ailing mother to support, well, it would be impossible.
( ( If ( he ( were ( someone ( who ( ( ( was ( an assistant ) ) , ) ( with ( an ( ailing ( mother ( to support ) ) ) ) ) ) ) ) ) ) ) ( , ( well ( , ( it ( ( would ( be impossible ) ) . ) ) ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (PRP he)) (VP (VBD were) (NP (NP (NN someone)) (SBAR (WHNP (WP who)) (S (VP (VBD was) (NP (DT an) (NN assistant)) (, ,) (PP (IN with) (NP (DT an) (VBG ailing) (NN mother) (S (VP (TO to) (VP (VB support))))))))))))) (, ,) (ADVP (RB well)) (, ,) (NP (PRP it)) (VP (MD would) (VP (VB be) (ADJP (JJ impossible)))) (. .)))
It wouldn't be possible for him to be the assistant manager of Hardees if his mother was sick. 
( It ( ( ( would n't ) ( ( ( ( be possible ) ( for him ) ) ( to ( be ( ( the ( assistant manager ) ) ( of Hardees ) ) ) ) ) ( if ( ( his mother ) ( was sick ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (MD would) (RB n't) (VP (VB be) (ADJP (JJ possible)) (PP (IN for) (NP (PRP him))) (S (VP (TO to) (VP (VB be) (NP (NP (DT the) (JJ assistant) (NN manager)) (PP (IN of) (NP (NNP Hardees))))))) (SBAR (IN if) (S (NP (PRP$ his) (NN mother)) (VP (VBD was) (ADJP (JJ sick))))))) (. .)))