英文文法請益 - 考試

ps.因小弟是買函授，所以無法請教老師，
想請教高手大大幾題英文試題(出處:倪明老師講義)

1.------my father go shopping with my mother.
(A)Rarely does (B)Rarely has
答案是(A).老師有說過若要選(B)則題目需將go改為gone，
為何改成gone就可以選(B)?

2.I get him------- with her.
(A)to dance (B)dance
答案是(A). 使役動詞中get後也可接原形動詞，為何(B)不可選呢?

3.I'll get her------the shirt.
(A)wash (B)to wash
答案是(B).為何(A)不呢?

4.How many times-----shown in this city?
(A)has it been (B)have it been (C) has it
答案是(A) . 為什麼?

謝謝

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