Receptive/expressive phonologic/syntactic deficit syndrome is the most common form of SLI, in which the child's most obvious problems are a tendency to speak in short, simplified sentences, with omission of some grammatical features, such as past tense -ed. It is common also to see simplified speech production when the child is young. For instance, clusters of consonants may be reduced, so that "string" is pronounced as "ting". Vocabulary is often limited, with a tendency to use "general all-purpose" terms, rather than more specific words.