30:17
STRUCTURE
2339 Views
01:56
READING COMPREHENSION &VOCABULARY
1280 Views
01:52
The Form of Irregular Verbs
1286 Views
01:59
The Tense of the Passive Voice
1369 Views
09:31
Changing from Active into Passive
1141 Views
07:20
The Form of the Passive Voice
1351 Views
03:29
What is the Passive Voice?
1392 Views
03:45
The Form of the Active Voice
1353 Views
05:33
THE PRESENT PERFECT & THE SIMPLE PAST
1711 Views
03:20
Since vs For
1490 Views
04:50
Have or Has
1309 Views
00:49
Key Words: Present Perfect
3072 Views
09:03
The Use of the Present Perfect
1297 Views
03:08
Meaning and Form
1339 Views
02:40
Writing Formal Letters
1335 Views
03:10
Language Use
1929 Views
09:35
Parallel Structure
1483 Views
04:35
Prepositions of Instruments and Means
1316 Views
03:27
Polite Requests
1386 Views
06:30
May as a Modal of Permission and Request
1367 Views
04:11
Can as a Modal of Permission and Request
1173 Views
02:50
عناصر الاداء
1323 Views
03:45
شركة ستيرن
892 Views
01:15
مقياس القيمة المضافة
1117 Views
02:58
مقياس الربحية
1086 Views
02:39
معايير دركر
1237 Views
03:51
مقايس الاداء
1261 Views
01:41
اتخاذ اجراءات تصحيحية
951 Views
01:52
المرحلة الثانية من الرقابة
947 Views
02:49
مراحل الرقابة
2243 Views