知识点 1

Identify and fix sentence fragments, run-ons, and comma splices.

核心知识

A complete sentence needs a full thought, and two full thoughts cannot be held together by a comma alone.

深入理解

Rule: When ACT tests fragments, the trap is usually a dependent clause or a phrase that sounds finished because it is long. If the sentence starts with words like "because," "although," or "when," make sure a complete main clause follows.

When ACT tests run-ons, the issue is the opposite: two complete thoughts have been pressed together without the right connector or punctuation. Check whether each side could stand alone.

题目

示例解析

Which choice best completes the sentence?

"Because the lab was short on freezer space, _____"

选择一个答案查看解析