英文句子可以沒動詞嗎？ Just like celebrities at an award ceremony.只由介繫詞組成?

當然可以。在上下文情境清楚的條件下，動詞是可以被省略的。例如：
Q: Who killed Mr. Shah?
A: Lisa (did)!

A: Let's have pizzas!
B: Never!

情境：一群獵人在等待獵物...
獵人1：your two o'clock (妳的兩點鐘方向）

這些都是因為上下文明顯的狀況下省略了動詞的句子。但是請注意，省略動詞並不是沒有動詞。

The 77th Venice International Film Festival------------s
is featuring-------v

film featured features-----特色,號召====an adj phrase ; feature, featured, featuring, 

just like celebrities at an award ceremony---------predicate--predicate is the part of a sentence which makes a statement about the subject (s)--------o---->just like what=just=>an adv, not preposition.-----just like what celebrities do at an award ceremony.(as requested by your posting).

依照我看一下 感覺 like就是動詞 像的意思 "只是"像"xxxxxxx"

當然可以，例如：you are awful 然後........然後........

但是"Just like celebrities at an award ceremony"有動詞呀..."like"不就是嗎?

通常來說沒有be動詞就有動詞，一個最常見的例外就是簡答："No." 之類的