Question

这个句子语法对吗

不考虑用词是否恰当，仅仅就语法来看这句对吗？
并分析下成分

花园里常见的蜗牛
The snail that usually appeared in the garden

Answer 1

答：这不是个句子，而是一个名词词组。
the snail that ususally appeared in the garden 的中心词是the snail, 那只蜗牛，哪只呢？
后面跟着一个由that引导的限制性定语从句：那只通常在花园里出现的（过去的事情）
译：那只通常在花园里出现的蜗牛
而你的中文 花园里常见的蜗牛 表达的是一类蜗牛，是一般的情况，泛指的蜗牛，我想相应的英语是：
snails that often appear in the garden / snails that are often seen in the garden

Answer 2

不错。有两个细小错误。应该说：the snails that usually apear in the garden,that是关系代词，引导定语从句。

Answer 3

The snail that usually appears in the garden.

Answer 4

对。 snail 后接的是定语从句

Answer 5

正确的，当然句子不完整，就只相当于有snail这个主语