The verbs auxiliary we are concerned in here, continued my father, are, _am_; _was_; _have_; _had_; _do_; _did_; _make_; _made_; _suffer_; _shall_; _should_; _will_; _would_; _can_; _could_; _owe_; _ought_; _used_; or _is wont_. 
'The auxiliary verbs we are concerned in here,' he continued, 'are, am; was; have; had; do; did; make; made; shall; should; will; would; can; could; owe; ought; used; or is wont. 